Select the pair of substances which has the one with the higher equilibrium vapor pressure at a given temperature listed first.

Question

Quizplus · Accepted Answer

The substance with the higher vapor pressure will have a weaker intermolecular force and will be more likely to enter the gas phase at a given temperature. Bromine (Br2) has weaker intermolecular forces than chlorine (Cl2) due to its larger size, and therefore has a higher equilibrium vapor pressure at a given temperature. Therefore, the pair Cl2, Br2 should be listed as Br2, Cl2.

Select the Pair of Substances Which Has the One with the Higher