Physics
A substance on heating undergoes (i) a rise in it's temperature, (ii) a change in it's phase without change in it's temperature. In each case, state the change in energy of molecules of the substance.
Calorimetry
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Answer
(i) When a substance on heating undergoes a rise in it's temperature then average kinetic energy of molecules increases.
(ii) When a substance on heating undergoes a change in it's phase without change in it's temperature then average potential energy of molecules increases.
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