Question

elaborate on the reason why heating water up will increase the rate of dissolving for a solute.
a. the average kinetic energy of the solute molecules decreases with increasing temperature, and it changes the state of dissolution. increased movement of the solute molecules causes them to break, and thus they dissolve more readily.
b. the molecules that make up the solution speed up with increasing temperature. this increase in kinetic energy allows the solvent molecules to more effectively hold themselves together and strengthen the intermolecular attractions between solute molecules.
c. the average kinetic energy of the solute molecules also increases with temperature, and it destabilizes the solid state. the increased vibration (kinetic energy) of the solute molecules causes them to hold together better, and thus they dissolve more readily.
d. the average kinetic energy of the molecules that make up the solution also increases with increasing temperature. this increase in kinetic energy allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions.

Explanation:

Heating increases the average kinetic energy of both solvent and solute molecules. Higher kinetic energy makes solvent molecules move faster and collide with solute more effectively, breaking the intermolecular attractions holding solute particles together, which speeds up dissolution. Option A is wrong because kinetic energy increases, not decreases. Option B is incorrect as it claims solvent molecules hold together stronger, which does not aid dissolution. Option C is wrong because higher kinetic energy makes solute molecules hold together worse, not better.

Answer:

D. The average kinetic energy of the molecules that make up the solution also increases with increasing temperature. This increase in kinetic energy allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions.