Question

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

Answer 1

Answer: Option (A) is the correct answer.

Step-by-step 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.

`K.E \propto (3)/(2)kT`

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
`20^(o)C` to
`50^(o)C`, the substance absorbs heat and its kinetic energy increases.

Answer 2

Hello!

I think the answer to this question would be A) Absorbs; Increases.

I hope this is correct, and it helps you out! c: