Consider the change that occurs in the shape of the curve for the distribution of molecular energies in a gas when the temperature of the gas is increased - AQA - A-Level Chemistry - Question 9 - 2022 - Paper 3

At higher temperatures, the distribution of molecular energies shifts, leading to an increase in the most probable energy of the molecules. This means that option D is the correct answer. As the temperature rises, the average kinetic energy of the gas molecules increases, reflecting the increased number of molecules with energies around this higher most probable energy. Therefore, in this case, the correct statement is:

D. There is an increase in the most probable energy of the molecules.