加热气体使其分子运动速度加快。

Heating a gas causes the molecules to move faster.

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文中介绍一种利用工艺中液体冷却放出热量来加热气体的分离式热管换热器。

The paper introduces the separate type heat pipe exchanger to heat the gas from process liquid.

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研究结果表明，管内瓦斯爆炸过程中所产生的爆炸波有两个峰值，第一峰值为爆炸波压力，第二峰值压力为火焰到达后加热气体升压所致。

The result shows that there are two peak values, the first one is explosion wave pressure; the second is caused by the hot gas, which is heated by the subsequent flame.

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You take fuel, rather you take something that's warm, and you put it in contact with the atmosphere, it cools down.

改变约束,继续加热,气体膨胀。

麻省理工公开课 - 热力学与动力学课程节选