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Himanshu posted an Question
April 11, 2020 • 06:09 am 30 points
  • IIT JAM
  • Physics (PH)

Work done in thermodynamics

solve it by a short cut method. .

2 Answer(s) Answer Now
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  • 9 Comments
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  • Himanshu Pandey

    i am not doubting your ability sir i know u guys are among India's best faculty working for us day and night, thanks from depth of my heart

  • comment-profile-img>
    Abhishek singh

    Don't worry. We all have done this conceptually correct. unfortunately we did calculation mistakes. For instance, you can see my solution. Thier is a sign mistake. ofcourse which is not acceptable. Instead of doing (4+2 ) I did (-4+2) which resulted in 2 instead of 6. that's it. don't lose hope. We all here are ALL INDIA TOPPERS. I found it lovely that you informed us. Keep this spirit. you will do well in exams. All the best.

  • Himanshu Pandey

    i am attaching it's solution for sake of simplicity

  • Himanshu Pandey

    sorry to say no one answer is matching correct answer is 6RT and my answer is coming 3RT instead of taking 2 moles of gas

  • comment-profile-img>
    Somnath best-answer

    All you have to find integration of PdV. You have to find P in terms of V using given relation and ideal gas equation. At last you have to convert the limit of integration from V to in terms of T because initial and final value of T is given. See the attachment for solution.

    cropped3456007731471625262.jpg
    cropped4082497969561215222.jpg
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    Dhairya sharma

    if we use it diatomic then ans will be 2T otherwise 16.3T. see the attached below.

    cropped535621721226771868.jpg
    eduncle-logo-app

    sorry for interrupting. But couldn't follow how did you take pressure to be constant (while it is given to be a function of temperature)? My answer is not matching with your and options are also not available, so being curious I am asking. please don't take otherwise.

    eduncle-logo-app

    ys i agree but in question onlt one value of pressure is given.and we treat it as constant. if there were two values then we think further. and in thermodynamics things can happen when p is constant and T is changing. Hope u get my point of you.

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