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Question

First law of thermodynamics

A.

Enables to determine change in internal energy of the system

B.

Does not help to predict whether the system will or not undergo a change

C.

Does not enable to determine change in entropy

D.

All of these

Answer ( Option D)

All of these

Solution

The first law of thermodynamics does not indicate whether heat can flow from colder end to a hotter end or not. All that the first law tells is that if the process occurs, the heat energy gained by one end would be exactly equal to that lost by the other end.

To predict the direction of process, entropy and free energy change values should be used instead.

Hence, the correct option is (D).

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