Question

define heat energy and its units​

Answer 1

Explanation:

Heat energy : In thermodynamics, heat is energy in transfer to or from a thermodynamic system, by mechanisms other than thermodynamic work or transfer of matter.[1][2][3][4][5][6][7] The various mechanisms of energy transfer that define heat are stated in the next section of this article.

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Answer 2

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Heat is a form of energy.

In Thermodynamic, The change in internal energy of a closed system is equal to the amount of heat applied minus the amount of work done by the system.

And is represented by : ∆ U = Q - W