The molar heat of vaporisation of a liquid is $6 \ kJ \ mol^{-1}$. If the entropy change is $16 \ J \ mol^{-1} \ K^{-1}$,the boiling point of the liquid is:

The entropy change involved in the isothermal reversible expansion of $2 \, \text{mole}$ of an ideal gas from a volume of $10 \, dm^3$ to a volume of $100 \, dm^3$ at $27 \, ^oC$ is : .............. $J \, K^{-1}$

For a spontaneous process,

For the reaction: $H^{+}_{(aq)} + OH^{-}_{(aq)} \rightarrow H_{2}O_{(l)}$,given the standard molar entropies $S^{o}(298 \ K)$ in $J \ K^{-1} \ mol^{-1}$ as $S^{o}(H^{+}) = 0$,$S^{o}(OH^{-}) = -10.7$,and $S^{o}(H_{2}O) = 70$. The standard entropy change $\Delta S^{o}$ for the reaction is ..... $J \ K^{-1} \ mol^{-1}$.

The change in entropy is negative for which of the following processes?

The total entropy change for a system and its surroundings increases,if the process is