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NEET Sample Paper NEET Sample Test Paper-37

  • question_answer
    An ideal gas heat engine operates in a Carnot cycle between \[\text{27 }\!\!{}^\circ\!\!\text{ C}\] and\[\text{127 }\!\!{}^\circ\!\!\text{ C}\]. It absorbs 6 kcal at the higher temperature. The amount of heat (in kcal) converted into work is equal to

    A)  3.5          

    B)  1.6

    C)  1.2          

    D)  4.8

    Correct Answer: C

    Solution :

     Efficiency of a Carnot engine is given by \[\eta =1-\frac{{{T}_{2}}}{{{T}_{1}}}\]\[\frac{W}{Q}=1-\frac{{{T}_{2}}}{{{T}_{1}}}\Rightarrow \frac{W}{6}=1-\frac{(273+127)}{(273+1=227)}\] \[\Rightarrow \]\[W=1.2\,kcal\]


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