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?

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.