When one mole of monoatomic ideal gas at TK undergoes reversible adiabatic change under a constant external pressure of 1 atm changes volume from 1 litre to 2 litre. The final temperature in kelvin would be:
1. T/(2)2/3
2. T + 2/(3x0.0821)
3. T
4. T - 3/(2x0.0821)
Equal volumes of monoatomic and diatomic gases at same initial temperature and pressure are mixed. The ratio of specific heats of the mixture (Cp/Cv) will be [AFMC 2002]
(1) 1
(2) 2
(3) 1.67
(4) 1.5
In an isobaric process, the ratio of heat supplied to the system (dQ) and work done by the system (dW) for diatomic gas is [AFMC 2002]
(1) 1 : 1
(2) 7 : 2
(3) 7 : 5
(4) 5 : 7
One mole of hydrogen gas at and 1 atm pressure is heated at constant pressure until its volume has doubled. Given that for hydrogen is 3.0 cal deg-1 mol-1, the and for this process are-
1. = 1490 cal and = 894 cal
2. = = 1490 cal
3. = 894 cal and = 1490 cal
4. = = 894 cal