GENERAL KNOWLEDGE

Detailed explanation-1: -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.

Detailed explanation-2: -At a higher temperature, there are more spaces between the water molecules for the sugar to dissolve into so the solution forms more quickly. The molecules of water are also moving faster at a higher temperature and this causes the dissolution rate to increase as well.

Detailed explanation-3: -Temperature. Heating up a solvent gives the molecules more kinetic energy. The increased rapid motion means that the solvent molecules collide with the solute with greater frequency, and that the collisions occur with more force. Both factors increase the rate at which the solute dissolves.

Detailed explanation-4: -The reason the hot water dissolves more is because it has faster moving molecules which are spread further apart than the molecules in the cold water. With bigger gaps between the molecules in the hot water, more sugar molecules can fit in between.

Detailed explanation-5: -Sugar crystals do not dissolve easily in ice cold water, because the low temperature slows down the process of diffusion. The solvent has low kinetic energy and therefore cannot move faster to surround the sugar crystals.