2. Solved Papers
  3. BCECE Medical

BCECE Medical BCECE Medical Solved Papers-2003

  • question_answer
    What is \[\Delta E\] for system that does 500 cal of work on surrounding and 300 cal of heat is absorbed by the system?

    A)  -200 cal       

    B)  -300 cal

    C)  +200 cal     

    D)  +300 cal

    Correct Answer: A

    Solution :

    Key Idea: From first law of thermodynamic.                 \[\Delta \,E=q+W\] Given \[q=+300\]cal (\[\because \] heat is absorbed)                 \[W=-500\] cal                 (\[\because \] work is done on surroundings). \[\therefore \] \[\Delta \,E=q+W\]                 \[=300+(-500)\] \[=-200\] cal.


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