Gibbs free energy of mixing at constant pressure and temperature is always__________________?

A. Expansion valve
B. Condenser
C. Refrigerator
D. Compressor

A. State functions
B. Path functions
C. Intensive properties
D. Extensive properties

A. Gibbs-Duhem
B. Maxwell’s
C. Clapeyron
D. None of these

A. 0
B. < 0
C. < 1
D. > 1

A. Temperature
B. Pressure
C. Volume
D. None of these

A. +ve
B. 0
C. -ve
D. ∞