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Question

Absolute value of internal energy can be easily measured.


A

True

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B

False

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Solution

The correct option is B

False


Internal energy of a system is nothing but the sum of translational, rotational, vibrational, electronic, nuclear etc energies of the molecules in the system.
Internal energy = Translational + rotational + vibrational + electronic + nuclear + . . . . . .
The method to calculate absolute values of all the energies at a given state is not available. Therefore absolute value of internal energy measurement is not possible.

We always measure the CHANGE in internal energy.


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