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So what they do is, they're describing how these thermodynamic properties change, in terms of only state functions and state variables.
他们的作用是描述,随着状态函数和状态变量的变化，系统的热力性质如何变化。
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So, these on-changing properties that describe the state of the equilibrium state of the system are called state variables.
这些描述,系统平衡态的,变化的属性,就叫做状态变量。
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So we know we always want to have our systems in as low an energy as possible, so it makes sense that a bond would happen any time we got a lower energy when we combine two atoms, versus when we keep them separate.
我们知道我们总是希望使我们的系统,处于能量尽可能低的状态，因此就应该有化学键产生,一旦我们合并两个原子之后体系的能量变得更低，相较于分开时。
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If you start segregating the gases, there are fewer possible configurations that because you're forcing a particular set of circumstances.
如果你开始分离这些气体，整个系统所具有的可能的状态就会变少,你强加了一个特定的条件。
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The amount of work you've put in to get here depends on the path. It's not a function of state.
这些量就能,决定系统的状态了。
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So the state variables describe the equilibrium's state and they don't care about how this state got to where it is.
状态变量,描述平衡态，它们并不关心,系统是如何演化成这样的。
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So the system will not be described by a single state variable during the path.
因此系统将不能被,路径上的单一状态变量描述。
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It's at equilibrium, under the new condition, that is with the barrier removed.
系统在新的状态下处于平衡，这个新的状态就是指隔板被取走了。
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So, if we want to go from that stable state to that less stable state, we need to put in a certain amount of energy to our system, that difference between the free electron and the electron bound to the metal.
所以，如果我们想使电子,从稳态到达不够稳定的状态，我们需要引入一定数量的,能量到系统中，即自由电子和束缚于金属的,电子的能量差。
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I don't need to know about a specific path here.
这只涉及系统的状态函数。
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It's already in the lowest enthalpy state.
系统已经处于自由焓最低的状态。
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