Which of the following facts cannot be a...

Which of the following facts cannot be answered by the first law of thermodynamics?

During a spontaneous process, energy of the universe is constant

During a nonspontaneous process, energy of the universe is constant

Transformation take place spontaneously in one direction but not in the other.

All of these

Text Solution

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The correct Answer is:

First law fails to develop any criterion for the spontaneity of a process because the energy of the universe is constant in both natural and unnatural directions.

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First law of Thermodynamics is

the extension of law conversation of energy

` Delta U = q+w`

the algebraic sum of energy or mass changes in any isolated system is unchanged

gives idea of entropy

Which of the following is the correct relation of the first law of thermodynamics?

`Delta = q - W`

`Delta E = Delta q +Delta W`

`Delta E = q + W`

`Delta E = Delta q +W`

Which of the following is incorrect regarding the first law of thermodynamics ?

It is not applicable to any cyclic process

It is a restatement of the principle of conserva- tion of energy

It introduces the concept of the internal energy

It introduces the concept of the entropy