List of top Chemistry Questions on Thermodynamics asked in Punjab PMET

The temperature of the system decreases in the process of

In a closed insulated container a liquid is stirred with a paddle to increase the temperature, which of the following is true?

$2$ mole of ideal gas at $ 27^{\circ}C$ temperature is expanded reversibly from $2\,L$ to $20\,L$ . Find entropy change $(R=2\,cal/mol\,K)$

Unit of entropy is

For reversible process, the value of $\Delta S$ is gives by the expression:

One mole of water at $100^{\circ} C$ is converted into steam at $100^{\circ} C$ at a constant pressure of $1\, atm .$ The change in entropy is [heat of vaporisation of water at $100{ }^{\circ} C =540\,cal / gm ]:$

The enthalpies of all elements in their standard states are: