The pressure and density of a diatomic gas $\left(\gamma =\frac{7}{5}\right)$ changes adiabatically from $\left(p_1, {\rho }_1\right)$ to $\left(p_2, {\rho }_2\right)$. If $\frac{{\rho }_2}{{\rho }_1}=32$, then $\frac{p_2}{p_1}$ be

In figures we see $p-V$ diagrams for cyclic processes for a gas. In which of these processes is heat absorbed by the gas ?

Two moles of helium gas has passed through a cyclic process shown in the $p-T$ diagram in figure (Fig. $20.61$). If the gas is ideal, work done on the gas for the process $A$ to $B$ is $(\gamma$ for the gas is $1.67)$

In the above cycle, work done on the gas in the process $D$ to $A$ is

In the above cycle, work done on the gas in the whole cycle $ABCDA$ is