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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asked Mar 26, 2017 134k views

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Mjkaufer · Answer 1 · 2017-04-01T21:48:58+0000

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

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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