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Q.

A system is provided 50J of heat and work done on the system is 10 joule. What is the change in internal energy in joules is --------

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answer is 60.

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Detailed Solution

Using the first law of thermodynamics:

Change in internal energyU=heat providedq+work done W

Substituting the values:

U=50 J+10 J=60 J

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