Question

write the definition of Internal energy?​

Answer 1

Explanation:

The internal energy of a thermodynamic system is the energy contained within it. It is the energy necessary to create or prepare the system in any given internal state. ... The thermodynamic processes that define the internal energy are transfers of matter, or of energy as heat, and thermodynamic work.

Answer 2

Explanation:

Internal energy is a state function of a system and is an extensive quantity. One can have a corresponding intensive thermodynamic property called specific internal energy, commonly symbolized by the lowercase letter u, which is internal energy per mass of the substance in question.

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