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- 28. What will be the value of freezing point depression constant of cyclobutene having freezing point of 280 K and molar enthalpy of fusion of 2.68 kJ mol™¹? (Molar mass of cyclobutene = 56.108 g mol-¹ and R = 8.314 JK-¹ mol¹) a) 14.63 K g mol-¹ -1 b) 16.14 Kg mol-¹ c) 13.64 Kg mol-¹ d) 12.64 K g mol-¹ARecuvalentActivity.do?locator=assignment-take O Other Bod [References] Use the References to access important values if needed for this question. 900 800 Carbon disulfide 700 600 Methanol 500 Ethanol 400 Heptane 300 200 100 10 20 30 40 50 60 70 80 90 100 110 Temperature (°C) The vapor pressure of diethyl ether is 400 mm Hg at 18.0 °C. From the plot of vapor pressures vs temperature above, estimate the temperature at °C which the vapor pressure of ethanol is 400 mm Hg. than the heat of vaporization of ethanol. The heat of vaporization of diethyl ether would be expected to be larger 2 item attempts remaining Submit Answer Try Another Version smaller Previnus Next 3:49 PM 5/5/2022 SONY Vapor pressure (mm Hg)ST4D.3 - The vapor pressure of a substance at various mole fractions in a mixture were found to be as follows. Estimate the Henry's law constant [in MPa] for the substance for the particular solvent of this mixture. USE ALGEBRA instead of a graphical approach. Don't forget there's one more data point that isn't listed in the table (the origin). 0.00230.01020.0182 99.7 48.8 |P/КРа 27.7 Type your answer...
- In benzene, dimerization occurs with benzene due to hydrogen bonding. In 110 g of benzene, 1.70g of acetic acid is dissolved that increases the boiling point by 0.40 oC. What is the expected degree of association of acetic acid? (Use Kb=2.57 Kg mol-1 )?10 g of glucose dissolved in 400 g of ethanol, raise the boiling point by 0.148ºC; 2 g of an unknown substance dissolved in 100 g of ethanol raises the boiling point by 0.1251ºC. What is the molecular weight of the unknown substance?The vapor pressure of water at 30 °C is 4.24 kPa. Calculate the vapor pressure if 65.0 g of glycerol, C.H.O.(1), is added to 100.0 mL of water. The density of water at 30 °C is 0.996 g.mL-¹.
- 1. An organic student did an experiment extracting benzoic acid from a mixture of other organic substances. Other analyses of the obtained sample confirmed the presence of benzoic acid. The student also measured the melting point of the white solid, 117.4-121.6 oC. The literature mp of benzoic acid is 122.3oC. What can you conclude about the sample? Select one. Group of answer choices The sample of benzoic acid contains soluble impurities. The student obtained a good yield of benzoic acid. The sample of benzoic acid contains insoluble impurities. The student obtained pure benzoic acid from the extraction. The student obtained a poor yield of benzoic acid. 2. Which phenomenon are sometimes confused with melting during mp analysis? Select all that apply. Group of answer choices decomposition cracking shaking sagging/shrinking sweating solidifying 3. Study the bond types in the compound shown. Select the type(s) of intramolecular force(s) you predict the substance to exhibit. Select all…Calculate the solubility of nitrogen in water at an atmospheric pressure of 0.390 atm (a typical value at high altitude).Atmospheric Gas Mole Fraction kH mol/(L*atm)N2 7.81 x 10-1 6.70 x 10-4O2 2.10 x 10-1 1.30 x 10-3Ar 9.34 x 10-3 1.40 x 10-3CO2 3.33 x 10-4 3.50 x 10-2CH4 2.00 x 10-6 1.40 x 10-3H2 5.00 x 10-7 7.80 x 10-4When 2.62 g of the nonvolatile solid anthracene, C14H10,is dissolved in 100.0 g of cyclohexane, C6H12, the boilingpoint of the cyclohexane is raised by 0.41°C. Calculate Kbfor cyclohexane.
- The vapor pressure of pure toluene at 60 °C is 0.198 atm. A solution prepared by dissolving 2.2 mol naphthalene (nonvolatile) in 14.8 mol toluene will have a vapor pressure of atm. 0.227 Oa. Ob. 0.151 O. 0.0294 O d. 0.172 Oe. 0.0256Calculate the total pressure in a binary system where the mole fraction of A in the vaporphase is 0.200, the vapor pressure of pure A is 100. mmHg and the vapor pressure ofpure B is 300. mmHg.1a. If the mole fraction of cyclohexane in your mixture was 0.95, calculate the vapor pressure of your mixture if the vapor pressure of cyclohexane = 150.5 mm Hg. 1b. The vapor pressure of pure ethanol is 60.8 mm Hg. Would you expect it to have a higher boiling point or a lower boiling point that cyclohexane? Please answer part a and b and show work. Thanks
