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 - Misconceptual Questions: 6


Choice B.

Work Step by Step

As the gas expands, its volume increases and it does positive work W on its surroundings. Since Q = 0 for an adiabatic process, the first law of thermodynamics $\Delta U = Q-W$ shows that the internal energy must decrease. For an ideal gas, the temperature is proportional to the gas’s internal energy so the temperature decreases. Use the ideal gas law, PV = nRT. If the volume increases as the temperature decreases, the pressure must decrease.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.