A diatomic ideal gas is used in a Carnot engine as the working substance. If during the adiabatic expansion part of the cycle the volume of the has increased from V to 32 V, the efficiency of the engine is:

One mole of a monoatomic 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 :

An ideal gas heat engine is operating between 227^oC and 127^oC. It absorbs 10⁴ J of heat at the higher temperature. The amount of heat converted into work is:

First law of thermodynamics is a consequence of conservation of:

The internal energy change, when a system goes from state A and B is 40 kJ mole^-1. If the system goes from A to B by a reversible path and returns to state A by an irreversible path, what would be the net change in internal energy ?

The PT diagram for an ideal gas is shown in the figure, where AC is an adiabatic process. Find the corresponding PV diagram ?

               

The efficiency of a Carnot engine operating between temperatures of 100^oC and -23^oC will be:

The internal energy change in a system that has absorbed 2 kcal of heat and done 500 J of work is:

Which is an intensive property ?

An engine has an efficiency of ¹/6. When the temperature of sink is reduced by 62^oC, its efficiency is doubled. The temperature of the source is: