The efficiency of a Carnot's engine, working between steam point and ice point, will be  $....\,\%$

The internal energy change in a system that has absorbed $2\,\, kcal$ of heat and done $500\, J$ of work is ........... $\mathrm{J}$

If $\Delta U$ and $\Delta W$ represent the increase in internal energy and work done by the system respectively in a thermodynamic process, which of the following is true?

A monoatomic gas is supplied heat $Q$ very slowly keeping the pressure constant. The work done by the gas will be

An ideal gas undergoes a quasi static, reversible process in which its molar heat capacity $C$ remains constant. If during this process the relation of pressure $P$ and volume $V$ is given by $PV^n = $ constant, then $n$ is given by (Here $C_P$ and $C_V$ are molar specific heat at constant pressure and constant volume, respectively)

If $R =$ universal gas constant, the amount of heat needed to raise the temperature of $2 \,mol$ of an ideal monatomic gas from $273\, K$ to $373\, K$ when no work is done is-