Why Do Sugar Cubes Dissolve Faster in Hot Water? Read more: Why Do Sugar Cubes Dissolve Faster in Hot Water?

        Sugar is an example of a crystalline solid that is soluble in water. It can dissolve faster in hot water than cold water because there is more energy in the hot water molecules. Because they are moving faster, they have more energy to break the bonds holding the sugar together. There is also more energy available to break the hydrogen bonds holding the water together.