UPSC General Studies Sample Paper General Studies Sample Paper-2

  • question_answer
    Which of the following phenomena occur during the adiabatic heating of gas?
    1. Heat input from the surrounding            
    2. Change in entropy of the gas
    3. Compression of the gas
    Select the correct answer using the codes given below.

    A)  1 and 2           

    B)  1 and 3

    C)  Only 2             

    D)  Only 3

    Correct Answer: D

    Solution :

    [d] An adiabatic process is one, in which there is no heat exchange with the surrounding. There is an increase in entropy of the gas during a irreversible adiabatic process. However, during a reversible adiabatic process, there is no change in entropy. Adiabatic heating involves compression of the gas, while adiabatic cooling involves expansion of the gas.

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