Question

What happens when the thermal energy of a substance increases?

Answer 1

When the temperature of an object increases, the average kinetic energy of its particles increases. When the average kinetic energy of its particles increases, the object's thermal energy increases. Therefore, the thermal energy of an object increases as its temperature increases

Answer 2

Hey..,

Well that depends on what the material is...

However the kinetic energy of the electron increases causing more randomness..

Also the substance gets heated up..

Which changes a lot of properties..