Heat is supplied to a di-atomic gas at constant pressure. The ratio of $\Delta Q : \Delta U : \Delta W$ is
$5 : 3 : 2$
$5 : 2 : 3$
$7 : 5 : 2$
$7 : 2 : 5$
$1\;g$ of water, of volume $1\; \mathrm{cm}^{3}$ at $100^{\circ} \mathrm{C},$ is converted into steam at same temperature under normal atmospheric pressure $\left(=1 \times 10^{5} \;\mathrm{Pa}\right) .$ The volume of steam formed equals $1671 \;\mathrm{cm}^{3} .$ If the specific latent heat of vaporisation of water is $2256\; \mathrm{J} / \mathrm{g}$, the change in intemal energy is.....$J$
$P-V$ diagram of $2\, g$ of $He$ gas for $A \to B$ process is shown. What is the heat given to the gas ?
If sink and source temperature of a refrigerator are $4^{\circ} C$ and $15^{\circ} C$ respectively. Then efficiency of refrigerator is
A cyclic process $ABCA$ is shown in $PT$ diagram. When presented on $PV$, it would be
If $R =$ universal gas constant, the amount of heat needed to raise the temperature of $2\, mol$ of an ideal monoatomic gas from $273\, K$ to $373\, K$ when no work is done is