It's true for any gas, and if I remove this limit here, r t is equal to p v bar, I'm going to call that an ideal gas.
这样的气体被称作理想气体,这就是理想气体的性质,理想气体的涵义是什么?
T p V I've got three variables, T, p and V.
一共有三个变量:
I'm pressing on the gas. So I expect that to be a positive number. The pressure is constant 0 p. The V goes from V1 to zero.
我们对气体加压,所以这应该是一个正数,压强是常数,p,V从V1变成。
So instead of p, here I'm going to put nRT over V.
于是把p写成。
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