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That is, it's easy to write down straight away that dG with respect to temperature at constant pressure S is minus S.
这就是说，可以很简单的写出dG在,恒定压强下对温度的偏导数,是负。
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And if delta G is greater than zero, then it goes spontaneously in the other direction.
如果dG大于零会怎样，那体系会向着反方向自发转变。
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dG/dT That is, this is, dG/dT at constant pressure.
这就是恒定压强下的。
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dG/dp And this is dG/dp at constant temperature.
这是恒定温度下的。
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When delta G is zero, you know, it doesn't mean that you've got all of one side, all reactants and zero products or all products and zero reactants.
当dG等于零的时候，化学反应并不处在任何一边，例如全部都是反应物没有生成物,或者全部都是生成物而没有反应物。
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If delta G equals zero, then we're already in equilibrium.
如果dG等于零，我们就处于平衡态。
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SdT So dG is dH minus T dS minus S dT.
所以dG等于dH减去TdS再减去。
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Vdp So dG is minus S dT plus V dp.
结果是dG等于负SdT加上。
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