Question

Statement 1 : Absolute value of internal energy of a
substance cannot be determined.
Statement 2 : It is impossible to determine exact values of
constitutent energies of the substances.

Answer 1

Both the assertion and reason are true and the reason is the correct explanation of the assertion.

Explanation:

• Statement 1 : Absolute value of internal energy of a  substance cannot be determined.
• Statement 2 : It is impossible to determine exact values of  constitutent energies of the substances.

It is that absolute values of internal energy of substances cannot be determined. It is also true that to determine exact values of constituent energies of the substance is impossible.

Thus both the assertion and reason are true and the reason is the correct explanation of the assertion.