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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermodynamics Laws & Specific Heats of GasesMedium2 minQB

PhysicsMediuminteger

What work has to be done adiabatically to increase the root mean square speed of a mole of a diatomic gas $η = 5$ times from $T_{1} = 300$ K?

Answer:

150000

Solution:

$v_{r m s} \propto T$ , so $T_{2} = 25 T_{1} = 7500$ K. Adiabatic: $W = Δ U = \frac{5}{2} R Δ T = \frac{5}{2} \times 8.314 \times 7200 = 1.50 \times 1 0^{5}$ J.

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

⏱ 2mℹ️ Source: QB

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