Saturated liquid benzene at pressure P1=10 bar (T1=451.7K) is throttled in a steady-flow process to a pressure P2=1.2bar (T2=358.7K), where it is a liquid-vapor mixture. Estimate the molar fraction of the exit stream that is vapor. For liquid benzene, approximate Cp=162J/molK. You may ignore the effect of pressure on the enthalpy of liquid benzene. deltaHvap(P=1.2bar)=30.5kJ/mol. Note: process is adiabatic and isenthalpic.

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