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Manipal Medical Manipal Medical Solved Paper-2014

  • question_answer
    A person, with body temperature of 310 K, was sliding with considerable friction, down a mountain whose temperature was 277K. Which of the following sets of signs of entropy change is correct? \[\Delta S\](system) \[\Delta S\](surroundings) \[\Delta S\](total)

    A)  +            +                    +

    B) +           +               can't be predicted

    C) +            -                     +

    D)  -           +                     +

    Correct Answer: C

    Solution :

    Here the person and surface of mountain constitutes a system and the atmosphere is the surroundings. Sliding down a mountain is a natural, spontaneous process. \[\Delta {{S}_{total}}>0\]. Also, due to considerable friction, both person and mountain surface will be heated and will gain in entropy i.e., \[\Delta {{S}_{system}}>0\] therefore\[\Delta {{S}_{surr}}<0\].


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