Which of the following is not correct for a reversible adiabatic process:
A. TVγ-1 = constant
B. p1-γ.TY = constant
C. PVγ = constant
D. None of these
Equation which relates pressure, volume and temperature of a gas is called the:
A. Equation of state
B. Gibbs Duhem equation
C. Ideal gas equation
D. None of these
At triple point (for one component system), vapour pressure of solid as compared to that of liquid will be:
A. More
B. Less
C. Same
D. More or less; depending on the system
Mollier diagram is a plot of:
A. Temperature vs. enthalpy
B. Temperature vs. enthalpy
C. Entropy vs. enthalpy
D. Temperature vs. internal energy
Compressibility factor (i.e., the ratio of actual volume of gas to the volume predicted by ideal gas law) for all gases are:
A. Always greater than one
B. Same at the same reduced temperature
C. Same at the same reduced pressure
D. Both B. & C
In a turbine, the fluid expands almost:
A. Isothermally
B. Isobarically
C. Adiabatically
D. None of these
The number of degrees of freedom at the triple point of water is:
A. 0
B. 1
C. 2
D. 3
The chemical potential for a pure substance is _____ its partial molal free energy:
A. More than
B. Less than
C. Equal to
D. Not related to
A closed system is cooled reversibly from 100°C to 50°C. If no work is done on the system:
A. its internal energy (U) decreases and its entropy (S) increases
B. U and S both decreases
C. U decreases but S is constant
D. U is constant but S decreases
Enthalpy ‘H’ is defined as:
A. H = E – PV
B. H = F – TS
C. H – E = PV
D. None of these
