Question

#1--The vapor pressure of liquid pentane, C₅H₁₂, is 100. mm Hg at 260 K. A 0.221 g sample of liquid C₅H₁₂ is placed in a closed, evacuated380. mL container at a temperature of 260 K.

Assuming that the temperature remains constant, will all of the liquid evaporate? _____yes/no

What will the pressure in the container be when equilibrium is reached? ______mm Hg

#2--

The vapor pressure of liquid ethane thiol, C₂H₅SH, is 100. mm Hg at 260 K.

A sample of C₂H₅SH is placed in a closed, evacuated 514 mL container at a temperature of 260 K. It is found that all of the C₂H₅SH is in the vapor phase and that the pressure is 58.0 mm Hg. If the volume of the container is reduced to 381 mL at constant temperature, which of the following statements are correct?

Choose all that apply.

Some of the vapor initially present will condense.

Only ethane thiol vapor will be present.

Liquid ethane thiol will be present.

The pressure in the container will be 100. mm Hg.

No condensation will occur.

#3--

The vapor pressure of liquid chloroform, CHCl₃, is 40.0 mm Hg at 266 K.

A sample of CHCl₃ is placed in a closed, evacuated container of constant volume at a temperature of 390 K. It is found that all of the CHCl₃ is in the vapor phase and that the pressure is 48.0 mm Hg. If the temperature in the container is reduced to 266 K, which of the following statements are correct?

Choose all that apply.

Only chloroform vapor will be present.

No condensation will occur.

The pressure in the container will be 40.0 mm Hg.

Some of the vapor initially present will condense.

Liquid chloroform will be present.