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Question
Define heat energy on the basis of kinetic theory of matter.
Solution
Heat energy: On the basis of the kinetic theory of matter, heat energy is defined as the sum total of kinetic and potential energies of all the molecules of a given substance.
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Assertion (A): 0 °C = 273.16 K. For our convenience we take it as 273 K after rounding off the decimal.
Reason (R): To convert a temperature on the Celsius scale we have to add 273 to the given temperature.
