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Railways NTPC (Technical Ability) Thermodynamics Question Bank Thermodynamics

  • question_answer
    1600 kJ of energy is transferred from a heat reservoir at 800 K. to another heat reservoir at 400 K. The amount of entropy generated during the process would be:

    A) 6 kJ/K              

    B) 4 kJ/K

    C) 2 kJ/K              

    D) zero.

    Correct Answer: C

    Solution :

    \[{{(\Delta \,s)}_{gen}}=Q\left( \frac{1}{{{T}_{2}}}-\frac{1}{{{T}_{1}}} \right)\] \[=1600\left( \frac{1}{400}-\frac{1}{800} \right)=2\text{kJ/K}\]


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