At $10\, ^oC$,$1\, mol$ of an ideal gas is allowed to expand reversibly and adiabatically from $10\, L$ to $200\, L$. Calculate the change in entropy in $cal/K$.

$30.4 \, kJ$ of heat is required to melt one mole of sodium chloride and the entropy change at the melting point is $28.4 \, J \, K^{-1} \, mol^{-1}$ at $1 \, atm$. The melting point of sodium chloride is $........... \, K$ (Nearest Integer).

Considering entropy $(S)$ as a thermodynamic parameter,the criterion for the spontaneity of any process is

Assertion : Entropy of ice is less than water.
Reason : Ice has a cage-like structure.

Of the following,the largest value of entropy at $25^{\circ} C$ and $1 \ atm$ is that of

State the limitation of the $2^{nd}$ law of thermodynamics.