Use the observation in the first column to answer the question in the second column.  At 29°C, Substance A has a vapor pressure of 112. torr and Substance B has a vapor pressure of 122. torr. Which has a higher enthalpy of vaporization?   The enthalpy of vaporization of Substance E is smaller than that of Substance F. At any temperature where both substances are liquid, which has the higher vapor pressure?   At 1atm pressure, Substance C boils at −8.°C and Substance D boils at 15.°C. Which has a higher vapor pressure?

Select the substance which the lowest vapor pressure at a given temperature.     mercury, Hg     ethanol, CH3─CH2─OH     water, H2O     methane, CH4     gasoline, C8H18

The normal boiling point of a liquid is 282 °C. At what temperature (in °C) would the vapor pressure be 0.465 atm? (AHvap = 28.5 kJ/mol)

31. Which of the following liquids would you expect to have the lowest vapor pressure at room temperature? Note that bp means boiling point. a) Ethylene glycol (bp, 198°C) b) Benzene (bp, 80°C) c) Ethanol (bp, 78.3°C) d) Chloroform (bp, 62°C) e) n-pentane (bp, 36.1°C)

Difluoroethene has two isomers with very different properties despite having the same chemical formula.   a) The normal boiling point of the isomer shown here is -28 °C and the enthalpy of vaporization is 21.4 kJ/mol. What is the vapor pressure in atm of this compound at -86 °C?   b) would you expect the vapor pressure of the nonpolar isomer to be higher or lower at -86 celcius than the polar isomer?

Use the observation in the first column to answer the question in the second column. observation The enthalpy of vaporization of Substance A is bigger than that of Substance B. At 28 °C, Substance C has a vapor pressure of 114. torr and Substance D has a vapor pressure of 134. torr. At 1 atm pressure, Substance E boils at -12. °C and Substance F boils at -44. °C. question At any temperature where both substances are liquid, which has the higher vapor pressure? O Substance A O Substance B Neither, A and B have the same vapor pressure. O It's impossible to know without more information. Which has a higher enthalpy of vaporization? O Substance C O Substance D O Neither, C and D have the same enthalpy of vaporization. O It's impossible to know without more information. Which has a higher vapor pressure? Substance E O Substance F O Neither, E and F have the same vapor pressure. It's impossible to know without more information.

Enter your answer in the provided box. The vapor pressure of ethanol is 1.00 × 102 mmHg at 34.90°C. What is its vapor pressure at 53.23°C? ( AHvap for ethanol is 39.3 kJ/mol.) mmHg

Which of the following would be expected to have the highest vapor pressure at room temperature?               A. benzene, bp = 80°C    B. ethanol, bp = 78°C                              C. propanol, bp = 97 °C    D. water, bp = 100°C       E.  methanol, bp = 65°C

Use the phase diagram of Substance X below to find the melting point of X when the pressure above the solid is 7.0 atm. pressure (atm) 心。 0 °C جات solid 200 liquid 400 temperature (K) Note: your answer must be within 25 °C of the exact answer to be graded correct. X gas 600

Methanol has a normal boiling point of 64.6 °C and a heat of vaporization of (∆Hvap) of 35.2 kJ/mol.  What is the vapor pressure of methanol at 7.0 °C?