本题目来源于试卷: The Laws of Thermodynamics，类别为 IB物理学
[问答题]
Use the conservation of energy to explai a*q;r5( j:(hi wavenqn why the temperatupk-t:* recihnr:h9b /re of a gas increases when it isik nhe-*b pt:/h9:crr quickly compressed — say, by pushing down on a cylinder — whereas the temperature decreases when the gas expands.
参考答案: During compression, work is done
on the gas. Assuming that there is no
heat flow to or from the gas (since the process is quick), by conservation of
energy (the first law of thermodynamics) the work done on the gas becomes
internal energy of the gas, and so the temperature of the gas is increased. During expansion, work is done by the gas on
its surroundings. Again assuming that
there is no heat flow to or from the gas, by conservation of energy, the work
is done by the gas at the expense of the internal energy of the gas, and so the
temperature of the gas is decreased.
本题详细解析:
暂无
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