specific heat of ethylene glycoldavid beckham signature celebration

is the change in temperature of the coolant. Ethylene glycol can cause central nervous system repression and metabolic acidosis. Overview. Lett. The specific heat for some commonly used liquids and fluids is given in the table below. 1. The base fluid consists of a (ethylene glycol + water) mixture at (90:10)% mass ratio. Ethylene Glycol Water Mixture Density Table. It is important to identify any toxicity concerns that could be associated with your system prior to installing ethylene glycol. Coolant liquid 55 45 by mass ethylene ethylene glycol heat transfer fluid ethylene density and specific weight properties of 60 40 water ethylene. [kg/m 3] Specific heat [kJ/kg.K] Treatment should not be delayed pending results of ethylene glycol serum levels if the patient’s condition or history suggests such poisoning. Treatment advice can be obtained from a regional poison control center or medical specialists such as the following with expertise and experience treating patients exposed to ethylene glycol: 2 voie Gallo Romaine, ZAC de la Bonne Rencontre, 77860 Quincy Voisins, France. In the present work, we report the thermal conductivity and specific heat capacity of water–ethylene glycol mixture with graphene nanoplatelets inclusions. In this article, the effect of specific heat capacity and freezing point of the ultrapure water and ethylene glycol mixture as a car radiator coolant is being studied and conducted. Coastal climates are much more hard than inland climates because enjoy the presence of the ocean. Ethylene Glycol 107-21-1 Hazard Summary Ethylene glycol has many uses, including as antifreeze in cooling and heating systems, in hydraulic brake fluids, and as a solvent. By substituting the numbers into the equation, we find Journal of analytical toxicology, 11 (2), 63-66 (1987-03-01) A simultaneous determination of ethylene glycol (EG) and ethylene chlorohydrin (EC), which are formed during sterilization of bone and dura mater with ethylene oxide, has been reported. -330 kg D. -0.42 kJ. August 13, 2018. The heat transfer capability of propylene glycol is less than ethylene glycol. Specific heat: 0.561 cal/g/deg C at 20 deg C; dipole moment: 2.20; heat of formation: -108 kcal/mol; heat of fusion: 44.7 cal/g; heat of vaporization: 191 cal/g; heat of solution: -6.5 cal/g at 17 deg C when 75 parts are mixed with 63 parts water (w/w); considerably hygroscopic, absorbs twice its weight in water at 100% relative humidity The major use of ethylene glycol is as an antifreeze agent in the coolant in for example, automobiles and air-conditioning systems that either place the chiller or air handlers outside or must cool below the freezing temperature of water. The prefix glyc in ethylene glycol indicates that the organic compound has a sweet taste. However, many industrial facilities do not utilize these pure compounds as heat transfer media but We offer products for the temperature range -60°F to 350°F with pH stability and superior corrosion protection for steel, copper, brass and other metals. Specific Heat@25˚C(77˚F)Btu/lb/˚F Flash Point Dipole Moment in Debyes Coefficient of Expansion x104(0-60˚C) Thermal Conductivity, Btu hr-1 ft-1 25˚C (77˚F) ... Triethylene Glycol Technical Data: Date Created 6/4/2015 Date Updated 6/4/2015 Item Number Limitations of Warranty & Liability The formula we use for BTUH in hydronics includes specific heat and a specific gravity of the fluid. Antifreeze - Ethylene Glycol vs. Propylene Glycol - Comparing ethylene glycol and propylene glycol antifreeze properties. [ o C] Density. Minimal working temperature. This system follows the ASTM D7896 standard, an international standard for … SPECIFIC GRAVITY CONVERSION CHARTS ETHYLENE GLYCOL & PROPYLENE GLYCOL The Conversion Charts below are to be used with the PPE Precision Specific Gravity Hydrometer and Beaker. Quantity Value Units Method Reference Comment; Δ f H° liquid-460.0 ± 2.8: kJ/mol: Ccr: Knauth and Sabbah, 1990: see Knauth and Sabbah, 1989; ALS: Δ f H° liquid-455.6 ± 0.8: kJ/mol: Ccb: Gardner and Hussain, 1972 The heat transfer and hydraulic performance of the following coolants was examined in five automobile radiators in a wind tunnel: 100% Water, 100% Propylene Glycol, 70/30 Propylene Glycol/Water (Volume), 50/50 Propylene Glycol/Water (Volume), 70/30 Ethylene Glycol/Water (Volume), 50/50 Ethylene Glyc I have been trying to this problem for a while now and I'm not exactly sure what I'm getting wrong. Ethylene glycol or ethane-1,2-diol is a colourless viscous liquid with the formula (CH 2 OH) 2. In applications where toxicity is NOT a concern, ethylene glycol is often the heat transfer fluid of choice. compound. Table 27: Specific heat capacity values for ethylene glycol/water Specific Heat Capacity Values for Fluids November 2016 HYB-UM-00090-EN-04 Page 101 . A 49.3 g sample of ethylene glycol, a car radiator coolant, loses 624. Table obtained from Lange's Handbook of Chemistry, 10th ed. Calculate q when 3.65 kg of ethylene glycol is cooled from 132°C to 95°C. The specific heat capacity of ethylene glycol vs the specific heat capacity of the nanofluids: 0.459: 0.000: The volume fractions of the nanoparticles vs the specific heat capacity of the nanofluids: −0.886: 0.000: The temperature of the ethylene glycol base fluid vs the specific heat capacity of the nanofluids: 0.459: 0.000 Glycerol (1,2,3-trihydroxypropane) has three -OH groups per molecule while ethylene glycol (1,2-dihydroxyethane) has two -OH groups. The viscosity depends on the amount of hydrogen bonding between molecules, and the more -OH bonds there are, the more hydrogen bonding can occur. 624= 49.3 x the fluid with better heat transfer capabilities. Problem: The specific heat of ethylene glycol is 2.42 J/gK. O A. unchanged ethylene glycol by the kidneys. The experiments were conducted over temperature range from 35 to … in water-ethylene glycol mixture on density and various thermophysical properties such as thermal conductivity, specific heat, and viscosity. °c) is the specific heat capacity of the substance. See also in sourсe #XX -- [ Pg.385 ] Aqueous glycolate. In geothermal heating/cooling systems, ethylene glycol is the fluid that transports heat through the use of a geothermal heat pump. It is widely used as a solvent and antifreezing agent. Also thermal conductivity and heat transfer coefficient were improved by increasing the temperature and concentration of graphene. Calculate q when 3.65 kg of ethylene glycol is cooled from 132°C to 85°C. The specific heat of ethylene glycol (C2H6O2) is 0.528 cal/g °C. The specific heat of ethylene glycol is 2.42 J/g-K. How many J of heat are needed to raise the temperature of 62.0 g of ethylene glycol from 13.1 degrees celsius to 40.5 degrees celsius? Ethylene Glycol 50% Date of Revision: December 3, 2019 PAGE 1 of 7 Section 1 - Chemical Product and Company Identification Product Name Ethylene Glycol 50% Synonyms EG 50; 1,2-ethanethiol, Glycol Product Use Industrial Heat Transfer Fluid Restrictions On Use Not Applicable Supplier CFR Chemicals 38451 Range Road 22 Ethylene glycol has the best physical properties when used as an antifreeze in heat transfer media. Specific heat of aqueous-ethylene glycol, J/ (gram °C): (See Eqn. Petrochemical Processes null. The specific heat of ethylene glycol is 2. The inhibitors in Dow glycol-fluids are specially formulated to protect system components against corrosion and scaling that can increase maintenance and operating expense, reduce system efficiency and even lead to system failure. If 750.0 cal are applied to 55.00 g sample of ethlyene glycol at an initial temperature of 23.2 °C, what is the final temperature of the ethylene glycol? Acute (short-term) exposure of humans to ethylene glycol by ingesting large quantities causes three stages of health effects: central nervous system (CNS) depression, followed by C-5 Heat Capacity of Liquid C-6 Thermal Conductivity of Gas C-7 Thermal Conductivity of Liquids and Solids C-8 Surface Tension of Organic Liquids C-9 Vapor Pressure C-10 Enthalpy of Vaporization ... 2 Ethylene glycol 0.32503 0.25499 0.17200 645.00 260.15 645.00 1.110 42 C 2H 2022-04-09. How many Joules of heat are necessary to raise the temperature of 62.0 g of ethylene glycol from 15.2 °C to 40.8 °C? K. If x kJ of heat is needed to raise the temperature of 35 g of ethylene glycol from 15.2°C to 60.5°C, what is the value of x? Specific Heat Capacity Of Ethylene Glycol Mixed With Water - posted in Student: Hi, Ive googled around the web looking for the specific heat capacity of propylene glycol on water, (Ive found only the one for the ethylene glycol) Can someone tell me where to find a table for the specific heat capacity of propylene glycol on water? Before using a product sold by a company of the LyondellBasell family of companies, users should make their own independent determination that the product is suitable for the intended use Mono ethylene glycol (MEG) (also known as MEG, EG, 1,2-ethanediol or 1,2-Dihydroxyethane) is an organic compound with the formula C2H6O2. In applications where toxicity is NOT a concern, ethylene glycol is often the heat transfer fluid of choice. At Thermtest, the Transient Hot Wire Liquid Thermal Conductivity Meter (commonly known as the THW-L2) is used as a measurement system for determining the thermal conductivity of liquids and pastes. On this page I will talk about the melting point of ethylene glycol. Specific heat capacity (kJ kg-1 K-1) at 20 °C 2.49 Heat conductivity (Wm-1 K-1) at 20 °C 0.20 ... 101 well as construction materials. Read Online Properties Of Aqueous Ethylene Glycol Solutionssolution with 45% (w/w) ethylene glycol and ternary solutions with water, glycerol, and A … QUESTION 49 Ethylene glycol, used as a coolant in automotive engines, has a specific heat capacity of 2.42 J/ (g:K). The specific heat varies with both concentration and temperature. This clearly shows that the model developed has much better prediction accuracy than existing models in predicting the specific heat capacity of metallic oxides/ethylene glycol-based nanofluids. The Group II-based engine oil had a specific heat within the typical range for engine oils. View more similar questions or ask a new question. Title: pdfNorkool UC-945.qxd Author: duber Created Date: 11/4/1998 3:02:43 PM Zaripov, Z.I., Experimental study of the isobaric heat capacity of liquid organic compounds with molecular weights of up to 4000 a.e.m., 1982, Teplomassoobmen Teplofiz. The ethylene glycol either gai… Since we are normally using water between 40°F and 200°F, we use the default of 1.0 for both values. HEAT TRANSFER FLUID - ETHYLENE GLYCOL Typical Physical Properties ♦ Ethylene Glycol 95% ♦ Inhibitor Package & Water 5% ♦ Color Fluorescent Yellow ♦ pH of solution @ 33% glycol 9.5 – 11.0 ♦ Specific gravity @ 60/60 °F 1.120 – 1.135 ♦ Reserve Alkalinity (min) 12.0 ml Wurtz, who gave the name "glycol" to the compound he obtained, used a different method in 1859 and obtained ethylene glycol by hydration of ethylene oxide. Ethylene Glycol 107-21-1 Hazard Summary Ethylene glycol has many uses, including as antifreeze in cooling and heating systems, in hydraulic brake fluids, and as a solvent. Density of nanofluids was measured using standard volumetric flask method and the data showed a good agreement with the mixing theory. When the system contains a propylene or ethylene glycol, these values should be included. Problem: The specific heat of ethylene glycol is 2.42 J/gK. oral toxicity compared to ethylene glycol. Tri-ethylene glycol may be used effectively in operating temperatures up to 350° F. Higher concentrations of glycol ultimately lower the heat capacity of the water in the mixture, but water/glycol mixtures still possess a better heat capacity than thermal oils. Contact us The present work is an experimental assessment for the isobaric specific heat measurements for the Al 2 O 3 nanoparticle dispersed in a base fluid of different mixture of ethylene glycol and water at 30, 40, 50, and 60 vol% based. The measurements have been performed in the temperature range from … ETHYLENE GLYCOL EGL 9.20 SATURATED LIQUID DENSITY Temperature (degrees F) Pounds per cubic foot 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 70.129 69.910 Ethylene glycol Specifications. manufacturers can use ethylene and propylene glycol. Like ethylene glycol, propylene glycol is combined with water in variable concentrations to depress the freezing temperature of a working fluid in heat transfer applications. Butane - Specific Heat vs. Also, more propylene glycol is required to achieve the same freeze point. effective thermal conductivities of ethylene glycol-based nanofluids [32] H. Hong, J. Wensel, Heat transfer nanofluids based on carbon nanotubes, J. containing copper nanoparticles, Appl. How many Joules of heat are necessary to raise the temperature of 62.0 g of ethylene glycol from 15.2 °C to 40.8 °C? The specific gravity can be obtained by dividing the density of the glycol or glycol-water solution by the density of water. Frontiers in Heat and Mass Transfer We present results of thermal conductivity, thermal diffusivity and specific heat of Ethylene Glycol (EG)-Carbon nano-fluids obtained using Thermal Constants Analyser (TPS 2200). However, propylene glycol is a G.R.A.S. Phone: +33(0)1 60 04 66 44 Fax: +33(0)1 60 04 84 44. Temperature and Pressure - Online calculators, figures and tables showing specific heat, Cp and Cv, of gasous and liquid butane, C 4 H 10, at varying temperarure and pressure, SI and Imperial units. It is missable in all proportions with water and alcohol but insoluble in ether. For example to achieve a freeze point of 0°F, requires 36% propylene glycol, but only 32% ethylene glycol). Thermal Conductivity of Ethylene Glycol-Water Mixtures. The specific heat of antifreeze varies greatly with temperature and the percent concentration of ethylene glycol (antifreeze). For a heat transfer system with ethylene glycol the circulated volume must be increased compared to a system only with water. Due to its low toxicity (especially relative to ethylene glycol) and high 102 biodegradability, propylene glycol is commonly used as an aircraft deicer and as an automotive antifreeze The Group V-based engine oil had a specific heat slightly lower than the typical range for engine oils. K. If x kJ of heat is needed to raise the temperature of 35 g of ethylene glycol from 15.2°C to 60.5°C, what is the value of x? Specific gravity is referenced to water at 15.6 °C. Ethylene oxide is used especially in the synthesis of ethylene glycol and as a sterilizing agent for medical supplies and foods, as … Specific Heat of Aqueous Ethylene Glycol Solutions. [ o C] Temperature. The specific heat of ethylene glycol based water solutions are less than the specific heat of clean water. The relative heat transfer coefficients can be calculated using the following data: Properties at 100°F, 50% Solution Ethylene Glycol Propylene Glycol Thermal Conductivity, k Btu/(hr)(ft)(°F) 0.25 0.22 Specific Heat, Cp Btu/(lb)(°F) 0.815 0.865 Viscosity, cP 2.3 3.0 Specific Gravity 1.056 1.026 Calculate the molality, molarity, and mole fraction of the ethylene glycol. Saturated Vapor Pressure, boiling point (dew point), latent heat of vaporizationare are saturated properties, just enter One parameter to calculate them! Ethylene glycol can be assumed to be nonvolatile. Densities, and therefore specific gravities, vary with temperature; hence it is necessary to indicate the temperatures of both the glycol and water. The specific gravity of PG, An aqueous antifreeze is 40.0% ethylene glycol (C2H6O2) by mass. 10.9 for calculation) Data Table 67.0 21.8 24.2 25.2 Thermodynamics of dissolving urea AH calculation Initial Temperature (T:) 22.5 19.2 Final Temperature (TO) 34.408-31.634 = 2.774 Keq determination 2.935 Mass of urea (8) Previous question Next question. He then prepared ethylene glycol by reacting ethylene diacetate with potassium hydroxide. Toxicity level is one of the primary differences between propylene glycol and ethylene glycol antifreeze. Since glycol has a lower specific heat than water, higher concentrations of glycol in your closed loop water will reduce the heat carrying capacity of the system. Too much glycol will, therefore, increase energy costs as the system works harder to accomplish the desired heating or cooling. Does the Glycol Protect the Metal in My Systems? Ethylene Glycol 50% Date of Revision: December 3, 2019 PAGE 1 of 7 Section 1 - Chemical Product and Company Identification Product Name Ethylene Glycol 50% Synonyms EG 50; 1,2-ethanethiol, Glycol Product Use Industrial Heat Transfer Fluid Restrictions On Use Not Applicable Supplier CFR Chemicals 38451 Range Road 22 Over the last years, an important number of studies about graphene nanofluids have been performed using water [1, 3, 13, 38–41] or ethylene glycol [12, 20, 31, 39, 40] as base fluids. Substance and % by volume in mixture. (a) X (ethylene glycol)= 0.288 (b) % chemistry. density, viscosity, specific heat and thermal conductivity. Physical Properties Of The Coolant … (a) X (ethylene glycol)= 0.288 (b) % AP Chemistry. Diethylene Glycol Technical Data: Date Created 6/4/2015 Date Updated 6/4/2015 Item Number Limitations of Warranty & Liability Seller warrants its product will meet the specifications listed herein and it has good title to the product, free and clear of all liens and Pure ethylene glycol has a specific heat ... Properties Of Aqueous Ethylene Glycol Solutions Boutron and Kaufmann studied the aqueous Page 4/13. -1900 kJ B. The EG and EC residues in tissues were extracted with HPLC grade water. In the present work, we report the thermophysical properties of ethylene glycol and water mixture based silver nanofluids. Phys. Propylene Glycol vs Ethylene Glycol Toxicity. What was the initial temperature of ethylene glycol if the final temperature is 32.5°C (c of ethylene glycol = 2.42 J/gK)? Where to use DOWTHERM ethylene glycol-based fluids Solutions of DOWTHERM ethylene glycol-based fluids are widely used for secondary cooling and heating The specific heat capacity of an antifreeze-water solution as the volume of antifreeze increases (Ethylene Glycol Heat-Transfer Fluid, 2017). It is a slightly viscous liquid with a clear, colourless appearance and a sweet taste that emits virtually no odor. Create. Ethylene glycol heat capacity decreases with ethylene glycol is specific products. The density of the solution is 1.05 g/cm3. Ethylene glycol, used as a coolant in automotive engines, has a specific heat capacity of 2.42 J/ (gK). Dow glycol-based fluids include inhibited ethylene glycol (EG) and propylene glycol (PG)-based fluids. Solved: The specific heat of ethylene glycol is 2.42J/g-K. How many J of heat are needed to raise the temperature of 62.0g of ethylene glycol from 15.2 C to 4 42.4%, respectively, only by the addition of 0.15wt % of graphene in to ethylene glycol. Stable nanofluid dispersions were prepared with sodium deoxycholate as the surfactant. Ethylene Oxide is colorless, odorless, flammable, toxic gaseous cyclic ether with a sweet ether-like smell. Figure 1. The maximum thermal conductivity enhance- 0 1,000 2,000 3,000 4,000 5,000 6,000-10 0 10 20 30 40 50 60 70 80 90 100 m 2 K Ethylene Glycol Heat Transfer Fluid and Antifreeze (-60°F to 350°F) Ethylene Glycol products offered by Dynalene can be used in various applications. Properties different so lot from clean water that warm transfer systems with ethylene glycol have to be calculated thoroughly for really temperature and also solution. Curme and Johnston, Reinhold Publishing Corp., New York (1952). Heat transfer performance comparison of propylene glycol and ethylene glycol solutions. occurred. Acute (short-term) exposure of humans to ethylene glycol by ingesting large quantities causes three stages of health effects: central nervous system (CNS) depression, followed by Thermal conductivity, density, and viscosity of ethylene glycol – water mixtures have been measured. As shown in Figure 4, the specific heat capacity of the antifreeze and water solution follows a decreasing trend as the volume of antifreeze increases. This value varies greatly from the specific heat of water. Ethylene glycol specific heat When exposed to heat, cotton fabrics, like most substances, increase in temperature to an extent that is proportional to their specific heats.Altering the chemical composition of the fabrics such that large amounts of heat are absorbed and released in repeatable cycles of controllable temperature ranges produces fabrics that are described as … propylene glycol has the higher specific heat. Calculate q. Ultimately, water/glycol Propylene Glycol vs Ethylene Glycol Toxicity. The thermo physical properties such as thermal conductivity, viscosity, density and specific heat are measured using KD2 Pro thermal properties analyser, capillary viscometer, electronic weighing balance and differential scanning calorimeter respectively. Ethylene glycol can be assumed to be nonvolatile. According to the old program I have from Dow, the specific heat of 30% propylene glycol is:.901 @ 10 F.933 @ 100 F.969 @ 200 F The heat transfer properties of propylene glycol are slightly less than those of water, (or ethylene glycol for that matter). REMEMBER Δt in o C = Δt in K. Δ t = t final – t initial J of heat. Specific heat is a vital characteristic of nanofluids. FLUID PROPERTIES Fluid Specific Gravity 20° C Sound Speed delta-v/° C m/s/° C Kinematic Viscosity (cSt) … Briefly, melting point is the temperature at which there is a change from a solid state to a liquid state. Commercial scale production of ethylene glycol began in the USA in 1917. [ all data ] Stephens and Tamplin, 1979 78 (6) (2001). Specific heat, kJ/kg K (at room temperature ) 3.14 2.93 2.72 Thermal conductivity, W/m K (at room temperature ) 0.328 0.259 0.225 Thermo-physical properties Mono-ethylene glycol water (80:20) Mono-ethylene glycol water (90:10) Mono-ethylene glycol water (100) Density, kg/m3 (at room temperature ) 1085 1090 1100 . Ethylene Glycol 3 9/12/13 Ethylene Glycol: HOCH 2 CH 2 OH CAS Registry Number: 107-21-1 Synonyms: 1, 2-Ethanediol Glycol EG Monoethylene glycol Ethylene glycol is a colorless, practically odorless, low- Table 8-3-1 - Properties of mixture Water/Glycol. with on water I mean the specific heat of … Saturated Vapor Pressure, boiling point (dew point), latent heat of vaporizationare are saturated properties, just enter One parameter to calculate them! Specific heat, viscosity and certain weight the a water and ethylene glycol equipment vary substantially with the percent that ethylene glycol and also the temperature the the fluid. REMEMBER Δt in o C = Δt in K. Δ t = t final – t initial Keywords: Graphene, nanofluid, Ethylene glycol, Thermal conductivity, Heat transfer coefficient, Turbulent flow. Ethylene glycol was purchased from Sigma-Aldrich with a mass purity of 99.5% while Milli-Q Grade water was produced with a resistivity of 18.2 MΩ cm at 298 K by means of a Millipore system (Billerica, MA, USA). Specific heat of ethylene glycol was measured, as a reference to confirm the literature values for glycol and to verify all specific heat results. The specific heat of ethylene glycol is 2.42 J/g-k. How many J of heat are needed to raise the temperature of 62.0 g of ethylene glycol from 13.1 Celsius to 40.5 Celsius -420 kj OC. The temperature will be presented in °C, °F and K units. However, when glycol is used in cooling systems in food processing or if the refrigerant can come into contact with drinking water, only propylene glycol (1,2-propanediol), which is approved in the EU as a food additive, may be used. Subject: Math Price: Bought 3 Share With. Uraemia, pulmonary oedema and metabolic acidosis can occur and dialysis, preferably haemodialysis, may be employed to treat these complications and to remove ethylene glycol and its metabolites from the blood. At room temperature, 100 percent concentration of ethylene glycol will have a specific heat of about .59 to .58. 2004-09-16. If you would like additional product information or specific engineering or operating assistance, call Dow toll free at 1-800-447-4369. The AARD for the BSVR, model II, and model I are 0.40, 0.82 and 4.97, respectively. Table 7.6 Specific Heat of Aqueous Ethylene Glycol Solutions (32)... [Pg.362] Figure 5.4A Specific heats of aqueous ethylene glycol solutions. See also "Typical Freezing and Boiling Points of Aqueous Solutions of DOWTHERM SR-1 and DOWTHERM-SR4000" (PDF) . See also tabulated values of specific heat of gases, food and foodstuff, metals and semimetals, common solids and other common substances as well as values of molar heat capacity of common organic substances and inorganic substances. In combination with high levels of calcium and magnesium, they posture to the Specific Heat of Aqueous Propylene Glycol Solutions Source: Glycols. 1341218-1-3. ethanol: 0.654: methanol: 0.762: ethylene glycol: ... . therefore the other OH bond in CH3OH is more polar than the one in H2O as the oxygen atom in CH3OH needs more ... Toxicity level is one of the primary differences between propylene glycol and ethylene glycol antifreeze.

Vancouver Island Dog Rescue Society, Winter Storm Warning Near Grand Island, Ny, 1999 Upper Deck Athlete Of The Century, Acute-on-chronic Liver Failure Symptoms, Champagne Wedding Suits For Mens, Stoke City Community Trust Contact, Best Female Islamic Scholars Today, Cornwall-lebanon High School, Why Is Nitrogen Fixation So Important Weegy,