consider the isothermal expansion of 1 mole of ideal gas at 300K ,the volume increase from30 to 40 L ,calculate : q,w ,△E,△H,△S,△G for two situation (1)free expansion(2)reversible expansion 谢谢大家阿 我不太懂free expansion , reverse expansion 是在哪些条件下造成这样的结果 等温膨胀,外压有改变吗? --

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