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Punjab Medical Punjab - MET Solved Paper-2010

  • question_answer
    If \[70cal\] of heat is required to raise the temperature of 2 mole of an ideal gas at constant pressure from\[{{30}^{o}}C\]to\[{{35}^{o}}C\], then the amount of heat required to raise the temperature of same gas through same range at constant volume is

    A) \[50cal\]                              

    B) \[70cal\]

    C) \[60cal\]                              

    D) \[65cal\]

    Correct Answer: A

    Solution :

    From\[\Delta Q=2{{C}_{p}}(\Delta T)\]            \[70=2\times {{C}_{p}}\times (35-30)\]           \[{{C}_{p}}=\frac{70}{10}=7cal/mol\,\,{}^\circ C\]        \[\Delta Q=m{{C}_{V}}(\Delta T\_=2\times 5\times 5=50\,\,cal\]


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