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PhysicsHeat & ThermoThermodynamicsMedium2 minQB

PhysicsMediumsingle choice

In an adiabatic expansion of air if the volume changes by 5%, the change in pressure in percentage is:

Answer:

Solution:

Air comprises O $_{2}$ , N $_{2}$ and CO $_{2}$ , all with $γ \approx \frac{7}{5}$ , so $γ$ of air is taken as $\frac{7}{5}$ .

For $P V^{γ} =$ const: $\frac{Δ P}{P} = γ \frac{Δ V}{V} = \frac{7}{5} \times 5% = 7%$ .

Stream:JEESubject:PhysicsTopic:Heat & ThermoSubtopic:Thermodynamics

⏱ 2mℹ️ Source: QB

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