What happens to the total entropy of the system and surroundings during a spontaneous irreversible process?

When a solid melts reversibly,which of the following occurs?

The enthalpy of vaporization of water is $186.5 \, kJ \, mol^{-1}$. What is the entropy of vaporization in $kJ \, K^{-1} \, mol^{-1}$?

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

Given $\Delta _rS^o = -266 \ J \ K^{-1}$ and the listed $S_m^o$ values,calculate $S^o$ for $Fe_3O_{4(s)}$ for the reaction: $4 Fe_3O_{4(s)} + O_{2(g)} \to 6 Fe_2O_{3(s)}$. Given $S_m^o(Fe_2O_3) = 87 \ J \ K^{-1} \ mol^{-1}$ and $S_m^o(O_2) = 205 \ J \ K^{-1} \ mol^{-1}$.

For the process $H_2O(\ell) \rightarrow H_2O_{(g)}$ at $T = 100^{\circ} C$ and $1 \ atm$ pressure,the correct choice is: