Regarding the internal energy of the molecule, which of the following statement is correct?

Question

Regarding the internal energy of the molecule, which of the following statement is correct? (A) Its absolute value can be successfully calculated (B) Its absolute value cannot be determined (C) It is the sum of vibrational and rotational energies (D) Both (1) (3)

Tardigrade Admin · Accepted Answer

The absolute value of internal energy cannot be determined since it is the sum total of all the energies at a molecular level. These energies cannot be determined and hence the absolute value of U cannot be determined.

Q. Regarding the internal energy of the molecule, which of the following statement is correct?

Its absolute value can be successfully calculated

Its absolute value cannot be determined

It is the sum of vibrational and rotational energies

Both (1) & (3)

The absolute value of internal energy cannot be determined since it is the sum total of all the energies at a molecular level. These energies cannot be determined and hence the absolute value of $U$ cannot be determined.