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JEE Main 201912 AprilEvening Shift
Exam
JEE Main
Year
2019
Date
12 April
Shift
Evening Shift
Subject
Physics
Chapter
Kinetic Theory of Gases

JEE Main 2019 · 12 April · Evening Shift · Physics · Kinetic Theory of Gases

A diatomic gas with rigid molecules does 10J of work when expanded...

A diatomic gas with rigid molecules does 10J10J of work when expanded at constant pressure. What would be the heat energy absorbed by the gas, in this process?

Options

  1. A40J40J
  2. B35J35J
  3. C25J25J
  4. D30J30J

Correct answer

B. 35J35J

Step-by-step solution

{C}_{p} = \dfrac{7}{2}R(fordiatomicgas)<br/>(for diatomic gas) <br/>\DeltaQ = n{C}_{p}\DeltaT \left(∴ Isobaricprocess\right)
\DeltaW=nR\DeltaT=10J\DeltaW = nR\DeltaT = 10J
Given
∴\DeltaQ=n×∴ \DeltaQ = n \times\dfrac{7}{2}R\DeltaT=R\DeltaT =\dfrac{7}{2}×10=35J{nR\DeltaT=10J}\times 10 = 35J \left\{nR\DeltaT = 10J\right\}
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