When a cup of hot chocolate cools from 90°C to 80°C, which of the following is happening to the molecules of the liquid?

Question

Quizplus · Accepted Answer

The rate of motion of molecules decreases as the temperature decreases, which is what happens when the hot chocolate cools from 90°C to 80°C. This is because temperature is a measure of the average kinetic energy of the molecules, so a decrease in temperature means a decrease in their kinetic energy and thus their rate of motion.

When a Cup of Hot Chocolate Cools from 90°C to 80°C