Question

Is it necessary that internal energy of a system increase after heat is given to it . why not all the heat energy convert in to mechanical energy and why some of the energy store as an internal energy ?​

Answer 1

Answer:

Internal energy is NOT all the energy in the system, it is the kinetic and potential energy associated with the random motion of the molecules of an object. If you heat an object, you will increase its internal energy. As the object cools, its internal energy will decrease.

Explanation:

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Answer 2

Explanation:

Internal energy is NOT all the energy in the system, it is the kinetic and potential energy associated with the random motion of the molecules of an object. If you heat an object, you will increase its internal energy. As the object cools, its internal energy will decrease.

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