Answer to Question #330790 in General Chemistry for zar

General Chemistry

Question #330790

A work of 657 J is done on a system that releases 434 J of heat. What is the energy change in the system?

Expert's answer

U = Q + W

When work is done on the system it is positive. When heat is released it's negative.

U = 657 - 434 = 223 J

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