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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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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:

ΔU = Q - W

We calculate as follows:

ΔU = 68 J - 32 J
ΔU = 36 J

Answer:

36j

Explanation:

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