Suppose 150 Joules of Work Is Done on a System

question 42

Multiple Choice

Suppose 150 Joules of work is done on a system and that 300 Joules of heat are delivered to the system. Which of these is predicted by the first law of thermodynamics?

• A) The internal energy U of the system increases by 450 J, since Q = +300 and W = -150.
• B) The internal energy U of the system decreases by 150 J, since Q = -300 and W = +150.
• C) The internal energy U of the system increases by 150 J, since Q = +300 and W = +150.
• D) The internal energy U of the system does not change.

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