This problem considers an adiabatic turbine$/$expander using the Peng$/$Robinson equation of state. that the Peng$-$Robinson is only semi$-$quantitative for water, so the results will differ slightly from steam table calculations.$)$

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What is the change in enthalpy in $(\frac{J}{m}ol)$ if the turbine$/$expander efficiency is ${}_E=0\mathrm{.}88?$ Remember to use the correct sign.

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