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JEE Main 202313 AprilEvening Shift
Exam
JEE Main
Year
2023
Date
13 April
Shift
Evening Shift
Subject
Physics
Chapter
Thermodynamics

JEE Main 2023 · 13 April · Evening Shift · Physics · Thermodynamics

The initial pressure and volume of an ideal gas are P _ 0 and V _ 0...

The initial pressure and volume of an ideal gas areP0{P}_{0} and V0{V}_{0}. The final pressure of the gas when the gas is suddenly compressed to volumeV04\dfrac{{V}_{0}}{4} will be:

(Given γ\gamma= ratio of specific heats at constant pressure and at constant volume.)

Options

  1. A

    P0(4)γ{P}_{0} ( 4{)}^{\gamma}

  2. B

    4P04{P}_{0}

  3. C

    P0{P}_{0}

  4. D

    P0(4)1γ{P}_{0} ( 4) \dfrac{1}{\gamma}

Correct answer

A.

P0(4)γ{P}_{0} ( 4{)}^{\gamma}

Step-by-step solution

As the gas is suddenly compressed the process is adiabatic.

So, PVγ=constantP{V}^{\gamma} = constant

⇒P0V0γ=P⋅(V04)γ⇒ {P}_{0}{V}_{0}^{\gamma} = P \cdot {\left(\dfrac{{V}_{0}}{4}\right)}^{\gamma}

⇒P=4γ⋅P0⇒ P = {4}^{\gamma} \cdot {P}_{0}

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