Question

During an adiabatic process, an ideal gas does 25 j of work. what is the change in the internal (thermal) energy of the gas during this process?

Answer 1

The change in the internal energy of the gas during the process is 25 J.

Explanation:

In an adiabatic process, no heat is gained or lost by the system. According to the first law of thermodynamics,

Q= dU + dW

Here, Q is heat gained or lost by the system,

dU is the change in the internal energy of the system,

dW is the work done,

As the process is adiabatic, Q=0 we get,

dU= ₋ dW = ₋ 25 J

The negative sign shows that there is a decrease in the temperature of the system.