Question

16. A gas performs 10J of work while expanding adiabatically. The change in its Themal energy is:
(A) 10 J X
(B) -10 J
(C) 100 J
(D) -200 J​

Answer 1

Answer:

b)...

Explanation:

Gas is expanding it means decrease it means temperature decrease (thermal energy)

Answer 2

Answer:

The change in thermal energy is $-10J$.

Explanation:

It is given that a gas performs $10J$ of work while expanding adiabatically.

In adiabatic process, there is no exchange of heat occurs between system and surrounding.

An adiabatic process is a type of thermodynamic process which occurs without transferring heat or mass between the thermodynamic system and its environment.

Adiabatic expansion is defined as the expansion where there is no heat interaction of the system with the surroundings and work is done by the system at the expense of its internal energy.

Here, change in thermal energy is negative of work done.

Hence, change in its thermal energy is $-10J$.

Option (B) is correct.

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