Question

A given system undergoes a change in which the work done by the system equals the decrease in its internal energy. The system must have undergone :

• A. Isothermal change
• B. Adiabatic change
• C. Isobaric change
• D. Isochoric change

Answer 1

The correct option is B Adiabatic change

Given $dW=-dU$

So, $dW+dU=0$

So, $dQ=0$

The process is adiabatic.