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KVPY Sample Paper KVPY Stream-SX Model Paper-17

  • question_answer
    A 15 g mass of nitrogen gas is enclosed in a vessel at a temperature \[27{}^\circ \text{C}\text{.}\] Amount of heat transferred to the gas, so that rms velocity of molecules is doubled, is about: [Take \[R=8.3J/K\]mole]

    A) 0.9 kJ

    B) 6 kJ

    C) 10 kJ

    D) 14 kJ

    Correct Answer: C

    Solution :

    \[\Delta Q=\frac{f}{2}nR\Delta T\] \[=\frac{5}{2}\left( \frac{15}{28} \right)(8.3)\,(1200-300)\] \[=10000\text{ }J.\]


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