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

Calculate the sign of $\Delta S$ for the melting of ice at $275 \ K$.

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

What is the unit of entropy?

For an endothermic reaction $A \rightarrow B$ to occur spontaneously at a constant temperature $T$,the entropy change $\Delta S$ must be:

What is the entropy change in $J K^{-1}$ during the melting of $27.3 \ g$ of ice at $0^{\circ} C$? (Latent heat of fusion of ice $= 330 \ J g^{-1}$)