Answer to Question #113386 in General Chemistry for kevin rosales sandoval

Question

. If you had a cup with warm water and a cup with cold water, which cup would sugar dissolve in faster? Why?

Answer 1

Heating up the solvent gives the molecules more kinetic energy. The more rapid motion means that the solvent molecules collide with the solute with greater frequency and the collisions occur with more force. Both factors increase the rate at which the solute dissolves.

Sugar dissolves faster in hot water than it does in cold water because hot water has more energy than cold water. When water is heated, the molecules gain energy and, thus, move faster. As they move faster, they come into contact with the sugar more often, causing it to dissolve faster.