A. Critical temperature
B. Melting point
C. Freezing point
D. Both B. and C
A. Cp < Cv
B. Cp = Cv
C. Cp > Cv
D. C ≥ Cv
A. Expansion of an ideal gas against constant pressure
B. Atmospheric pressure vaporisation of water at 100°C
C. Solution of NaCl in water at 50°C
D. None of these
A. RT d ln P
B. R d ln P
C. R d ln f
D. None of these
A. 0
B. 1
C. ∞
D. None of these
A. Pressure must be kept below 5.2 atm
B. Temperature must be kept above – 57°C
C. Pressure must be kept below 5.2 atm. and temperature must be kept above 57°C
D. Pressure and temperature must be kept below 5.2 atm. and – 57°C respectively
A. Reverse Carnot cycle
B. Ordinary vapour-compression cycle
C. Vapour-compression process with a reversible expansion engine
D. Air refrigeration cycle