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

In a adiabatic process, the state of a gas is changed from P₁, V₁, T₁ to P2, V₂, T₂. Which of the following relations is correct ?

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

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 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 ?

The equation of state for 5g of oxygen at a pressure p and temperature T, when occupying a volume V, will be

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

Which of the following parameters does not characterize the thermodynamic state of matter ?