Spontaneity Questions

For a spontaneous reaction the $\Delta G^{\circ }$, equilibrium constant ($K$) and $E_{\text{cell}}^{\circ }$ will be respectively:

Identify the correct statement regarding a spontaneous process:

In conversion of limestone to lime, ${\text{CaCO}}_3(s)\to \text{CaO}(s)+{\text{CO}}_2(g)$, the values of $\Delta H^0$ and $\Delta S^0$ are $+179.1{\text{kJ mol}}^{-1}$ and $160.2\text{J/K}$ respectively at $298\text{K}$. Above which temperature will the reaction become spontaneous?

For a particular reversible reaction at temperature $T$, $\Delta H$ and $\Delta S$ were found to be both $+\text{ve}$. If $T_e$ is the temperature at equilibrium, the reaction would be spontaneous when: