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woleraymond

  • 3 years ago

Calculate how much heat is needed to be supplied to a gas at a pressure of 1.25 x10^5 Pa, such that the pressure increases by 25 per cent at constant volume, and the internal energy by 120J.

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  1. shivam_bhalla
    • 3 years ago
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    Tell me what you have done till now. How have you approached the problem ??

  2. woleraymond
    • 3 years ago
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    @shivam_bhalla i really dont ve any idea yet

  3. shivam_bhalla
    • 3 years ago
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    Tip: Do you know first law of Thermodynamics.?? If yes apply that

  4. woleraymond
    • 3 years ago
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    U = Q - PV but the question is messing me up, coast isnt clear yet

  5. shivam_bhalla
    • 3 years ago
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    Ok. You are right. Now We have to find Q-->Heat supplied It is given that change in internal energy ( U ) = 120 J Now we have to find W? Now tell me the formula for W(work done)??

  6. woleraymond
    • 3 years ago
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    work done is Pressure times change in volume

  7. shivam_bhalla
    • 3 years ago
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    Right. Now what is change in volume here??

  8. woleraymond
    • 3 years ago
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    i tink its zero

  9. shivam_bhalla
    • 3 years ago
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    Yes you are right No tell me What is Q ?

  10. shivam_bhalla
    • 3 years ago
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    Now tell me What is Q ?

  11. woleraymond
    • 3 years ago
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    120J?

  12. shivam_bhalla
    • 3 years ago
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    Yes. You gave me the answer :)

  13. woleraymond
    • 3 years ago
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    thanks

  14. shivam_bhalla
    • 3 years ago
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    Welcome :)

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