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CMC Medical CMC-Medical Ludhiana Solved Paper-2010

  • question_answer
    For the reaction of one mole of zinc dust with one mole of sulphuric acid in a bomb calorimeter, AE and W correspond to

    A)  \[\Delta E<0,\]\[W=0\]

    B)  \[\Delta E=0,\,\,W<0\]

    C)  \[\Delta E>0,\,\,W=0\]

    D)  \[\Delta E=0,\,\,W>0\]

    Correct Answer: A

    Solution :

                    Bomb calorimeter is commonly used to find the heat of combustion of organic substances which consists of a sealed combustion chamber called a bomb, if a process is run in a sealed container then no expansion or compression is allowed, so, W = 0 and \[\Delta E=q.\] Thus, it has \[\Delta E<0,\]\[W=0\].


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