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NEET NEET SOLVED PAPER 2019

  • question_answer
    Under isothermal condition, a gas at 300 K expands from 0.1 L to 0.25 L against a constant external pressure of 2 bar. The work done by the gas is [Given that 1 L bar = 100 J] [NEET 5-5-2019]

    A) 25 J                             

    B) 30 J

    C) -30 J

    D) 5 Kj

    Correct Answer: C

    Solution :

    Thermodynamics \[W={{P}_{ext}}\Delta V\] = -2(bar) (0.15 L) = -0.3 bar: = -0.3 × 100 J = - 30 J           


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