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NEET Chemistry Thermodynamics / रासायनिक उष्मागतिकी Question Bank Self Evaluation Test - Thermodynamics

  • question_answer
    A piston filled with 0.04 mol of an ideal gas expands reversibly from 50.0 mL to 375 mL at a constant temperature of\[37.0{}^\circ C\]. As it does so, it absorbs 208 J of heat. The values of q and w for the process will be: \[\left( R=8.314\text{ }J/mol\text{ }K \right)\left( \text{ln }7.5=2.01 \right)\]

    A) \[q=+208\,J,w=-208J\]

    B) \[q=-208\,J,w=-208J\]

    C) \[q=-208\,J,w=+208J\]

    D) \[q=+208J,w=+208J\]

    Correct Answer: A

    Solution :

    [a] Process is isothermal reversible expansion, hence \[\Delta U=0\], therefore \[q=-w\]. Since \[q=+208\text{ }J,\text{ }W=-208\text{ }J\]


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