Question

1) The vapor pressure of liquid bromoethane, C₂H₅Br, is 100. mm Hg at 263 K. A 0.134 g sample of liquid C₂H₅Br is placed in a closed, evacuated 320. mL container at a temperature of 263 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 acetone, CH₃COCH₃, is 100. mm Hg at 281 K.

A sample of CH₃COCH₃ is placed in a closed, evacuated 525 mL container at a temperature of 281 K. It is found that all of the CH₃COCH₃ is in the vapor phase and that the pressure is 51.0 mm Hg. If the volume of the container is reduced to 348 mL at constant temperature, which of the following statements are correct?

Choose all that apply.

Only acetone vapor will be present.

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

No condensation will occur.

Liquid acetone will be present.

Some of the vapor initially present will condense.

Answer 1