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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermodynamics Laws & Specific Heats of GasesMedium2 minQB

PhysicsMediuminteger

Air at 300 K escapes from a cylinder at 8 atm to 1 atm so quickly that the expansion is adiabatic. Take $γ = 1.4$ . Find the final temperature in kelvin (nearest integer).

Answer:

166

Solution:

$T_{2} = T_{1} (\frac{P _{2}}{P _{1}})^{\frac{γ - 1}{γ}} = 300 \times (\frac{1}{8})^{0.2857} = 165.6$ K, about 166 K. The gas cools a lot.

Subject:PhysicsTopic:Heat & ThermoSubtopic:Thermodynamics Laws & Specific Heats of Gases

⏱ 2mℹ️ Source: QB

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