2. Questions Bank
  3. JEE Main & Advanced
  4. Physics
  5. Thermodynamical Processes

JEE Main & Advanced Physics Thermodynamical Processes Question Bank Self Evaluation Test - Thermodynamics

  • question_answer
    If the amount of heat given to a system is 35 J and the amount of work done on the system is 15 J, then the change in internal energy of the system is

    A) -50 J

    B) 20 J  

    C) 30 J

    D) 50 J

    Correct Answer: D

    Solution :

    [d] According to first law of thermodynamics \[\Delta Q=\Delta U+\Delta W\] \[\Delta U=\Delta Q-\Delta W\] \[\Delta Q=35J,\Delta W=-15J\] \[\Delta U=35J-\left( -15J \right)=50J\]


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