Question

why does a substance disolve faster on heating

Answer 1

The reason why it dissolves at a fasterrate in hot water has to do with increased molecular motion. The added energy in the hot water causes water molecules to move faster and sucrose molecules to vibrate faster. This added movement tends to make the bonds between sucrose molecules easier to overcome.

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Answer 2

Answer:

Increasing temperature (increased heat energy) results in increased kinetic energy. This increase in kinetic energy allows greater movement of the gas particles resulting in the intermolecular bonds between the gas solute and solvent being broken.