Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 15 - The Laws of Thermodynamics - Questions: 4

Answer

Work is done on the gas and the internal energy increases.

Work Step by Step

We use the first law of thermodynamics. $$\Delta U = Q-W$$ If the gas is compressed adiabatically, Q=0. $$\Delta U = -W$$ The compression means that work was done on the gas, so the work done by the system, W, is negative. We see that the change in internal energy is a positive quantity, meaning the internal energy of the gas increased, so the temperature increased.
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