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KVPY Sample Paper KVPY Stream-SX Model Paper-28

  • question_answer
    Half mole of an ideal monoatomic gas is heated at constant pressure of 1 atm from \[20{}^\circ C\] to \[90{}^\circ C.\] Work done by gas is close to: (Gas constant \[R=8.31\text{ }J/mol.K\])

    A) \[581\text{ }J\]

    B) \[291\text{ }J\]

    C) \[146\text{ }J\]

    D) None of these

    Correct Answer: D

    Solution :

    \[W=nR\Delta T\] \[=\frac{1}{2}\times 8.31\times 70\] \[=290.85\text{ }J\]


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