2. Solved Papers
  3. CEE Kerala Engineering

CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2000

  • question_answer
    A heat engine undergoes a process in which its internal energy decrease by 400 J and it gives out 150 J of heat. During the process:

    A)  it does 250 J of work and its temperature rises

    B)  it does 250 J of work and its temperature falls

    C)  it does 550 J of work and its temperature rises

    D)  it does 550 J of work and its temperature falls

    E)  250 J of work is done on the system

    Correct Answer: B

    Solution :

    From first law of thermodynamics \[\Delta U=Q-W,\]we have Given, \[\Delta U=-400\,J,Q=-150J\] \[\therefore \]  \[W=400-150=+250J,\] temperature rises.


You need to login to perform this action.
You will be redirected in 3 sec spinner