Will sugar cubes in hot water or powdered sugar in hot water dissolve quicker?

Answer 1

Powered sugar dissolves faster because it has more surface area.

Answer 2

This is because the powdered sugar has a largest surface area for the sugar molecules to interact with the solvent molecules. This increased area for interaction causes the powdered sugar to be pulled into solution faster.

Answer 3

Rate of dissolution is proportional to surface area, and, assuming that both entities have the same mass, a given quantity of powdered sugar has more surface area and thus will dissolve faster than that given quantity of sugar cubes.

Assume you have a lump of sugar in the form of a cube, with a volume of 1 cm3. According to the definition of the surface area of a cube, its surface area will be 1cm x 1cm x 6 = 6 cm2. Now powder it into granules that are also cubes, each with a volume of .001 cm3. The surface area of a face of any given cube is (.001 cm3)2/3, or .01 cm2. Multiply that by 6 faces for each cube, and, since the volume of each cube is one-thousandth the volume of the original cube, we multiply that by 1000 to get a surface area of 60 cm2, which is ten times the surface area of the original cube! Grind each of those little bits of sugar into a thousand tinier pieces and the surface area increases by another tenfold.

Keep in mind, though, that powdered sugar usually contains cornstarch, which is relatively insoluble in water.

Answer 4

no, sugar melts faster I think it is because of the chemicals that make up sugar

Answer 5

More surface area enhances more affective collisions between reactants and speeds the reaction.

Answer 6

no