Let me first ask you this, is this a reversible or in irreversible process? Right, let me add one more piece of data here which I said in words but which is actually important to write down before doing the problem.
让我先问你们,这是可逆过程,还是不可逆过程?好,让我加上一点简要的,但是很重要的前提,【p1>p2】这是可逆的吗?
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