On a relative basis,the weaker the intermolecular forces in a substance are,
A) the larger is its heat of vaporization.
B) the more it deviates from the ideal gas law.
C) the greater is its vapor pressure at a particular temperature.
D) the larger is its molar heat capacity as a liquid.
E) the higher is its boiling point.

Question

Quizplus · Accepted Answer

Weaker intermolecular forces result in higher vapor pressure at a given temperature. This is because weaker forces allow molecules to escape the liquid phase more easily, leading to a higher concentration of gas molecules in the vapor phase and therefore a higher vapor pressure. The other choices are not necessarily true and do not follow the trend of weaker intermolecular forces.

On a Relative Basis,the Weaker the Intermolecular Forces in a Substance