As temperature of this substance rises from 20°c to 50°c, the substance heat and its kinetic energy . a) absorbs; increases b) releases; increases c) absorbs; remains constant d) remains constant; increases

Option (A) is the correct answer.

Explanation:

When a substance absorbs heat energy then there will occur an increase in the temperature of the substance.

And, as there is occurring an increase in the temperature of substance. Kinetic energy is related to temperature as follows.

Hence, with increase in temperature there will also be increase in kinetic energy of the molecules of a substance.

Thus, we can conclude that as temperature of this substance rises from to , the substance absorbs heat and its kinetic energy increases.