What happens to the thermal energy of a mass if the average kinetic energy of its molecules goes up?

The thermal energy increases

Explanation:

The thermal energy is the total energy contained in a substance due to the thermal motion of its molecules.

In particular, the thermal energy of a substance is directly proportional to:

- The mass of the substance (the more the mass, the more the thermal energy)

- The average kinetic energy of the molecules of the substance (which is directly proportional to the temperature of the substance)

Therefore, we can write:

where

is the thermal energy of the substance

is the average kinetic energy of the molecules

Therefore, we see that if the average kinetic energy of the molecules goes up, then the thermal energy increases as well.

For any future Arva students, the answer is mass number or atomic mass.