在无数的反应物和生成物之间存在着平衡。
There is equilibrium between a whole myriad of reactants and products.
或者像B那样的反应物它是气态的。
因此反应朝反应物的方向进行。
我有T1下的反应物和量热计。
很大的数生成物，除以反应物。
It's a big number, you've got the products divided by the reactants.
从反应物到生成物的过程，是吸热的。
生成物的摩尔数减去反应物的摩尔数。
两摩尔反应物一摩尔生成物。
减去一点反应物的，化学势。
Subtract a little bit of chemical potential from the reactants.
如果在烧杯地步，有一些固态反应物。
If I have a beaker with some solid reactant on the bottom here.
然后你观察反应说，我有多少反应物？
And then you look at your reaction and you say, how many moles of reactants do I have?
更多的反应物，所以平衡常数K会下降。
没有反应物和生成物的熵。
The entropy of mixing of reactants and products wasn't there.
反应朝反应物的方向进行。
实际上会有部分的反应物，和部分的产物。
There would be some of the reactants and some of the products.
反应物的画在这里,让能量能量有些不同。
Then over here we'll have our reactants and make the energies different.
半衰期实际上是,一半反应物消失的时间。
So, the half-life is just the time that it takes for half of the reactants to disappear.
两摩尔反应物。，如果我改变压强会怎么样？
Two moles reactant... What happens if I change the pressure?
在反应物和生成物中，各有多少摩尔的气体？
How many moles of gas are there in each case, in reactants and products?
实际情况是生成物与反应物的混合。
我想知道，我已经有了，反应物和产物的混合。
And I want to know, I've got this mixture of reactants and products.
054摩尔，远比两倍要少，镁是极限反应物。
This is much less that two times 1,054, so therefore mag is the limiting reagent.
移除一点反应物。
反应物通过反应得到产物。
就这样，现在我们看反应物发生了什么。
There it is. Now, let's look at what happens to the product.
比如我们有大量的反应物，但是没有光。
Let's say we have an abundance of the starting material, and not very much light.
生成物和反应物的束缚能，通常不会相等。
The binding energies for the products and the reactants aren't in general going to be equal.
反应物这一边。
对于反应物和生成物。
比如，如果我作图，作为反应的函数，反应物在这边。
So for instance, if I plot, as function of the reaction, I've got the reactants on that side here.
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