All gases except ____________ shows a cooling effect during throttling process at atmospheric temperature and pressure?

A. Isobaric
B. Isothermal
C. Isentropic
D. Isometric

A. F = A + PV
B. F = E + A
C. F = A – TS
D. F = A + TS

A. (∂T/∂V)S = – (∂P/∂S)V
B. (∂S/∂P)T = – (∂V/∂T)P
C. (∂V/∂S)P = (∂T/∂P)S
D. (∂S/∂V)T = (∂P/∂T)V

A. Pressure
B. Volume
C. Temperature
D. All A, B. & C

A. Fugacity
B. Activity co-efficient
C. Free energy
D. None of these

A. 2.73
B. 28.3
C. 273
D. 283