A piston uses 32 J of energy to do work as 68 J of heat are added to the cylinder of the piston. The change in internal energy of the system is ___ J.

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Physics

Deandre Bishop

22 July, 16:03

A piston uses 32 J of energy to do work as 68 J of heat are added to the cylinder of the piston. The change in internal energy of the system is ___ J.

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Kai Ewing · Answer 1

Internal energy is defined as the energy associated with the random, disordered motion of molecules. It is denoted by U and calculated by the expression:

Δ U = Q - W

We calculate as follows:

ΔU = 68 J - 32 J

ΔU = 36 J