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The vapor pressure of liquid carbon tetrachloride, CCl4, is 40.0 mm Hg at 277 K.

ID: 1065275 • Letter: T

Question

The vapor pressure of liquid carbon tetrachloride, CCl4, is 40.0 mm Hg at 277 K. A sample of CCl4 is placed in a closed, evacuated container of constant volume at a temperature of 442 K. It is found that all of the CCl4 is in the vapor phase and that the pressure is 50.0 mm Hg. If the temperature in the container is reduced to 277 K, which of the following statements are correct? Choose all that apply. Liquid carbon tetrachloride 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. Only carbon tetrachloride vapor will be present.

Explanation / Answer

It is given that at 277 K the vapour pressure of liquid CCl4 is 40.0 mmHg

So, when when CCl4 condensed from 442 to 277 K,

Some of the vapour initially present will condense to liquid state.