Question

what happens to kinetic energy of the molecules of substance when it is cooled​

Answer 1

Answer:

When a substance is cooled, the kinetic energy of its molecules will (increase,decrease). ... If the kinetic energy of a substance's molecules decreases, then the substance is being (heated, cooled) and the space between molecules gets (smaller, bigger).

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Answer 2

Answer:

This is because temperature is a measurement of the average kinetic energy of a substance. So, when you cool a substance, the temperature drops and makes the molecules move slower, lowering its KE. Because the molecules are more at rest, their potential energy increases.

Explanation:

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