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    Proving the Joule-Thomson Effect

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    I wonder how one can use a partial derivative with constrain slope dH= 0 in a general equation with two partial derivatives where dH=0 is not true. The problem is for the Joule-Thomson effect. The question is much better described in the attachment. This is a problem from chemistry but since it is just mathematical I thought I might as well ask it in the math help part.

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    Solution Preview

    The reason why dH= 0 is because in the Joule-Thomson effect experiment, H is a constant (the derivative of constant is zero). I will show you why H is a constant.

    Suppose the gas occupies a volume V1 at a pressure P1 ...

    Solution Summary

    The solution gives detailed discussion on partial derivative on the applicaiton of chemstry: Joule-Thomson Effect.