A Solution of Potassium Hydroxide Is in Equilibrium with Undissolved

Multiple Choice

A solution of potassium hydroxide is in equilibrium with undissolved solute at 45°C. What will happen if the temperature is raised to 50°C? (ΔH_soln = -57.6 kJ/mol)

A) The mass of undissolved KOH will increase.
B) The mass of undissolved KOH will decrease.
C) The mass of undissolved KOH will be unchanged.
D) The mass of water in the solution will increase.
E) The entropy of the system will decrease.