SAT Subject Physics Practice Question 355: Answer and Explanation

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Question: 355

51. When a gas undergoes an adiabatic expansion, its

A. energy increases.
B. pressure increases.
C. volume decreases.
D. temperature increases.
E. temperature decreases.

Correct Answer: E

Explanation:

The correct answer is (E). An adiabatic expansion is a process in which no heat flows into or out of the system. During an adiabatic expansion the gas cools as it expands and does work.

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