Physics - Heat & Thermo Question with Solution | TestHub
PhysicsHeat & ThermoKinetic Theory of Gases and Gas LawsMedium2 minQB
PhysicsMediumsingle choice
A flask closed by a stop valve lets only molecules faster than a certain speed leave it and lets only molecules slower than that speed enter. What happens to the temperature of the air in the flask?
Options:
Answer:
B
Solution:
Fast molecules leave and slow ones enter, so the average kinetic energy of the molecules in the flask falls and the temperature decreases. B.
Subject:PhysicsTopic:Heat & ThermoSubtopic:Kinetic Theory of Gases and Gas Laws
⏱ 2mℹ️ Source: QB
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