On dissolving sugar in water at room temperature solution feels cool to touch. Under which of the following cases dissolution of sugar will be most rapid?

Question

On dissolving sugar in water at room temperature solution feels cool to touch. Under which of the following cases dissolution of sugar will be most rapid? (A) Sugar crystals in cold water (B) Sugar crystals in hot water (C) Powdered sugar in cold water (D) Powdered sugar in hot water

Tardigrade Admin · Accepted Answer

Powdered sugar has large surface area and thus, dissolves faster in hot water. As solution feels cool to touch, dissolution is endothermic so, dissolution will be favoured at high temperature.

Q. On dissolving sugar in water at room temperature solution feels cool to touch. Under which of the following cases dissolution of sugar will be most rapid?

Sugar crystals in cold water

Sugar crystals in hot water

Powdered sugar in cold water

Powdered sugar in hot water

Powdered sugar has large surface area and thus, dissolves faster in hot water. As solution feels cool to touch, dissolution is endothermic so, dissolution will be favoured at high temperature.