When a liquid boils,there is

An irreversible process occurring isothermally in an isolated system leads to

Fill in the blanks:
$(i)$ The entropy of one mole of a substance at a fixed temperature and standard state is called ........ .
$(ii)$ The unit of molar entropy is .......... .
$(iii)$ The process of conversion of graphite into diamond is of ........ type.

Entropy is maximum in case of

At the boiling point of water,$900 \ J/g$ of heat is exchanged. What is the increase in entropy in $J \ K^{-1} \ mol^{-1}$?

Considering entropy $(S)$ as a thermodynamic parameter,what are the necessary conditions for a process to be spontaneous?