Caiculate the normal boiling point of a substance that has a vapor pressure of 125 torr at 25.0 °C if the AHVAP for that substance is 31.5 kJ/mol.

A compound has a vapor pressure of 100 mmHg at 267 K and a normal boiling point of 338 K.  What is the ΔHvap for this compound in kJ/mol?

(a) Consider a substance where the intermolecular forces hold the molecules in fixed rigid positions. What is the process called when enough heat has been added to the substance so that the molecules begin to flow? (b) Consider a substance where the intermolecular forces hold the molecules in close contact with each other, but the molecules can flow. What is the process called when enough heat has been added to the substance so that the molecules escape each other? (c) Consider a substance where the intermolecular forces hold the molecules in fixed rigid positions. What is the process called when enough heat has been added to the substance so that the molecules can escape each other?

The enthalpy of vaporization of a substance is 48.1 kJ/mol. The normal boiling point is 115oC. What is the vapor pressure of this substance at 63.7oC?

5.

The normal boiling point of mercury (Hg) is 356.7 °C. What is the vapor pressure of mercury at 317.0 °C in atm? (AHvap = 58.51 kJ/mol)

The enthalpy of vaporization for methanol is 35.2 kJ/mol. Methanol has a vapor pressure of 101.3 kPa at 64.7 °C. Using the Clausius-Clapeyron equation, what is the vapor pressure for methanol at 37.7 °C? Give your answer in kPa, to the first decimal point.

Suppose the boiling point of pure water at high altitude is 85.00 °C. Use the Clausius-Clapeyron equation to determine the atmospheric pressure at this high altitude. The normal boiling point of water is 100.0 °C at 1 atm and its heat of vaporization is 40.7 kJ/mol.

.  The vapor pressure and enthalpy of vaporization of an unknown substance are measured to be 479.6 torr and 35.3 kJ/mol, respectively at room temperature (298.15 K). Estimate the normal boiling point of the substance at an atmospheric pressure of 760 torr.

A certain liquid has a vapor pressure of 92.0 Torr at 23.0 °C and 400.0 Torr at 45.0 °C. Calculate the value of AHvap for this liquid. AHvap = 52.3 Calculate the normal boiling point of this liquid. boiling point: 52 kJ/mol °C