The change in __________ is equal to the reversible work for compression in steady state flow process under isothermal condition.

A Internal energy
B Enthalpy
C Gibbs free energy
D Helmholtz free energy

Correct Answer: Gibbs free energy

Gibbs free energy:
$$\eqalign{ & G = H - TS \cr & \Rightarrow - dG = {W_R} - PdV \cr} $$
So, the decrease in Gibbs energy represents maximum useful work (excluding the expansion work) in a reversible process under isothermal and isobaric conditions.
Bissoy MCQ
#Chemical Engineering #Chemical Engineering Thermodynamics

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