Question

Find the change in internal energy of a system if 75 J of heat is transferred...

Find the change in internal energy of a system if 75 J of heat is transferred to it, and the system does 45 J of work on the surroundings.

If there is no change of state, what happens to the temperature.

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Answer #1

Heat transferred Q = 75 J

Work done W = 45 J

Change ininternal energy U = Q-W

                                        = 75 J - 45 J

                                        = 30 J

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