For free expansion of a gas, which is true
$Q = W = 0$ and $\Delta U = 0$
$Q = 0, W > 0$ and $\Delta U = -W$
$W = 0, Q > 0$ and $\Delta U = Q$
$W = 0, Q < 0$ and $\Delta U = 0$
The average degree of freedom per molecule of a gas is $6$ . The gas performs $25\ J$ work, while expanding at constant pressure. The heat absorbed by the gas is .... $J$
A termodynamic system is taken through the closed cycle $PQRSP$ process. The net work done by the system is ...... $J$
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 $(\gamma = 5/3)$ is suddenly compressed to $\frac{1}{8}$ of its original volume adiabatically, then the pressure of the gas will change to
In the cyclic process shown on the $P -V$ diagram, the magnitude of the work done is