What does the free energy change of dissolution, $\Delta G_{\text{diss}}$, tell us about whether a solute will dissolve spontaneously in a solvent at a given temperature and pressure?
Question 2
Which equation correctly relates free energy, enthalpy, and entropy for dissolution at temperature $T$?
Question 3
A salt dissolves in water with $\Delta H_{\text{soln}} = 12\,\text{kJ/mol}$ and $\Delta S_{\text{soln}} = 50\,\text{J/(mol\cdot K)}$. What is the sign of $\Delta G_{\text{soln}}$ at $298\,\text{K}$?
Question 4
If a dissolution process has $\Delta H > 0$ and $\Delta S > 0$, what is the best description of when it will be spontaneous?
Question 5
Why does dissolving many ionic compounds in water often become more favorable when the entropy increases?
