One mole of an ideal gas at an initial temperature of T K does 6R joules of work adiabatically. If the ratio of specific heats of this gas at constant pressure and at constant volume is 5/3, the final temperature of gas will be

A gas at state A changes to state B through path I and II shown in figure. The changes in internal energy are ΔU₁ and ΔU₂ respectively. Then

When a system is taken from the initial state i to final state f along the path iaf, it is found that Q = 50 cal and W = 20 cal. If along the path ibf, Q = 36 cal, then W along the path ibf is

                      

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 gas increased from V to 32 V, the efficiency of the engine is

In thermodynamic processes which of the following statements is not true?

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.

The temperature-entropy diagram of a reversible engine cycle is given in the figure. Its efficiency is

                         

A scientist says that the efficiency of his heat engine which works at source temperature of 127^oC and sink temperature 27^oC is 26%

An ideal gas initially at P₁, V₁ is expanded to P₂, V₂ and then compressed adiabatically to the same volume V₁ and pressure P₃. If W is the net work done by the gas in complete process, which of the following is true ?

An ideal gas is taken through the cycle A B C A as shown in the figure. If the net heat supplied to the gas in the cycle is 5 J, the work done by the gas in the process C A is