HC Verma - Concepts of Physics Part 2

Book: HC Verma - Concepts of Physics Part 2

Chapter: 27. Specific Heat Capacities of Gases

Subject: Physics - Class 12th

Q. No. 8 of Objective I

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8

In an isothermal process on an ideal gas, the pressure increases by 0.5%. The volume decreases by about

Let the initial values of pressure and volume be P1 and V1, and let the final values of pressure and volume be P2 and V2.


Now for an isothermal process, PV = constant .. (i)


This gives us: P1V1 = P2V2.. (ii)


Since the pressure increases by 0.5%, the new pressure is



Substituting this value in (ii) :


P1V1 = 1.005P1V2


=> .


Hence, the volume decreases by (1-0.995) = 0.005 = 0.5%


Hence, the correct option is (b).

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