Question

What happens to a gas's thermal energy as that gas's temperature increases?

Answer 1

Answer:

When molecules are heated (absorb energy) they move faster – some, or all of the heat energy is converted to kinetic energy. So, when a gas is heated, the effect is to make the molecules move faster.

Answer 2

Answer:

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When the average kinetic energy of the molecules goes up (a rise in temperature), the average speed of the molecules increases. And lower average kinetic energy of the molecules means they have lower speed. However, a change in average kinetic energy is not directly proportional to a change in average speed.

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