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NEET
Exam
NEET
Subject
Physics
Chapter
Thermodynamics

NEET · Physics · Thermodynamics

One mole of an ideal diatomic gas undergoes a transition from A to...

One mole of an ideal diatomic gas undergoes a transition from AA to BB along a path ABAB as shown in figure. The change in internal energy of the gas during the transition is

One mole of an ideal diatomic gas undergoes a transition from A to B along a path AB as shown in figure. The change in

Options

  1. A−20KJ- 20KJ
  2. B20J20J
  3. C−12KJ- 12KJ
  4. D20KJ20KJ

Correct answer

A. −20KJ- 20KJ

Step-by-step solution

One mole of an ideal diatomic gas undergoes a transition from A to B along a path AB as shown in figure. The change in

Change in internal energy

∆U=f2nR(T2−T1)=f2(p2v2−p1v1)∆ U = \dfrac{f}{2}nR\left({T}_{2} - {T}_{1}\right) = \dfrac{f}{2}\left({p}_{2}{v}_{2} - {p}_{1}{v}_{1}\right)
⇒∆U=52(2×6−5×4)=−20KJ⇒ ∆ U = \dfrac{5}{2}\left(2 \times 6 - 5 \times 4\right) = - 20KJ

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