A system goes from A to B via two processes I and II as shown in the figure. If ΔU1 and ΔU2are the changes in internal energies in the processes I and II respectively, then
ΔU1 = ΔU2
ΔU1 > ΔU2
ΔU1 < ΔU2
relation between ΔU1 and ΔU2 cannot be determined.
Which one of the following is not a state function ?
temperature
entropy
pressure
work
Universal gas constant is
CP - CV
CP + CV
Which of the following is incorrect regarding the first law of thermodynamics ?
It introduces the concept of the internal energy
It introduces the concept of the entropy
It is not applicable to any cyclic process
It is restatement of the principle of conservation of energy
The molar specific heat at constant pressure of an ideal gas is (7/2)R. The ratio of specific heat at constant pressure to that at constant volume is
7/5
8/7
5/7
9/7
One mole of a mono atomic gas is heated at a constant pressure of 1 atmosphere from 0 K to 100 K. If the gas constant R = 8.32J/mol K, the change in internal energy of the gas is approximately.
2.3 J
46 J
8.67 x 103 J
1.25 x 103 J
5.6 litre of helium gas at STP is adiabatically compressed to 0.7 litre. Taking the initial temperature to be T1, the work done in the process is
Which one is correct ?
In an isobaric process, ΔP = 0
In an isochoric process, ΔW = 0
In an isothermal process, ΔT = 0
In an adiabatic process, ΔQ = 0
The efficiency of a Carnot engine operating between temperatures of 100oC and -23oC will be
Which of the following is not a thermodynamic coordinate?
P
V
T
R
