A gas in a closed container with constant volume is heated from room temperature to 100°C. According to the kinetic molecular theory, the
A)average velocity of the molecules will increase.
B)gas will increase in weight.
C)individual molecules of the gas will increase their size.
D)average distance between molecules will increase.
E)pressure on the sides of the container will decrease.

Question

Quizplus · Accepted Answer

According to the kinetic molecular theory, when a gas is heated, the average kinetic energy of its molecules increases. Since the temperature of the gas is proportional to the average kinetic energy of its molecules, an increase in temperature means an increase in the average velocity of the molecules. Thus, choice A is the best answer.

A Gas in a Closed Container with Constant Volume Is