dT/dp is mu JT. So for a real gas like air, this is a positive number. It's not zero.
所以对于像空气这样的真实气体,这是一个正数,不等于零。
But this is a compound, right, it has some non-zero heat of formation from the elements. So is water, right?
但这是种化合物,对吧?,它具有非零的生成热,水也是一样,对吧?
So even though we think of conditions as being Boolean values true or false, really underneath the hood true means anything other than zero.
即使我们考虑,布尔值的真假条件,在底层“真“表示非零。
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