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And in practical terms, we can define the efficiency as the ratio of the heat in to the work out.
在实际中，我们定义,效率为热与功的比值。
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And it's not hard to see how the heat of reaction at room temperature can be related to they heat of reaction at other temperatures.
知道室温下的反应热,如何与其他温度下的反应,热联系起来这点并不困难。
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You do it so quickly that the heat flow between the inside of the bicycle pump and the outside is too slow compared to the speed at which you compress.
我们用力很大,于是压缩得很快,打气筒内外热传递的速度,与之相比要慢得多。
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So if I worry about energy I have a pretty good chance of extracting out these heat capacities, right, and I don't have to worry about exactly which path and I can really mix things up.
而能量与热容有密切的关系,从能量就可以就算出这两个热容，我不需要考虑到底是哪一条路径,可以随意计算。
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There's no heat flowing from the environment to the system. I have to define my terms.
系统与外界间,并没有热传递发生。
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Every time you do the experiment T in equilibrium with the heat bath at T, v2 you'll get the same p2 and V2.
与热库相接触的每次实验中,达到热平衡后的温度都是，压强都是p2，体积都是。
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That great deal of specificity implies that heat is also path-dependent and again we have the convention that if heat is added to the system, the quantity is greater than zero.
热也是与路径有关的,根据通常的习惯,如果我们对系统加热，其符号取为正。
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Heat capacity depends on path.
热容是与路径有关的。
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the zeroth law, which is the common-sense law, which says that if you take a hot object next to a cold object, heat will flow from the hot to the cold in a way that is well defined, and it allows you to define temperature.
上节课我们讨论了，热力学第零定律,这一定律源自常识：如果把一个热的物体,与一个冷的物体挨在一起，热量就会以确定的方式。
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That's common sense. This is part of your DNA, And then their final product is an object, a b which ends up at a temperature or a warmness which is in between the hot and the cold.
这是常识，是你的一部分，它们的最终产物是一个物体，其温度或温暖程度,介于热与,冷之间。
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Cp And delta T is given by the heat, which has to do with how much of the candle burnt, divided by the constant pressure heat capacity.
T等于热量q除以恒定的等压热容，其中热量与，蜡烛燃烧的多少相关。
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