本题目来源于试卷: 美国2021年物理杯赛真题 PHYSICS BOWL 2021，类别为 美国物理杯赛(Physics Bowl)
[单选题]
A monatomic ideal gas undergoes an adiabatic expansion. Which of the following statements is trueabout the gas?
A. The final temperature of the gas is less than the initial temperature of the gas.
B. Heat enters the gas from the surroundings during the process.
C. The final pressure of the gas is greater than the initial pressure of the gas.
D. Work is done on the gas from the surroundings during the process.
E. The internal energy of the gas remains unchanged during the process.
参考答案: A
本题详细解析:
An adiabatic process transfers energy to the surroundings only as work. In an adiabatic
process, no heat is allowed to flow into or out of the system, so Q=0. ΔU = Q– W. Because the gas does work, it cools.
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