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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermodynamics Laws & Specific Heats of GasesHard2 minQB

PhysicsHardnumerical

A diatomic gas ( $γ = 1.4$ ) is in a container of volume 100 $c m^{3}$ at $2 \times 1 0^{5}$ Pa and 300 K. It is adiabatically compressed to 33.3 $c m^{3}$ (one-third). Find the change in internal energy in joules (one decimal).

Answer:

27.60

Solution:

$T_{2} = 300 \times 3^{0.4} = 465.6$ K. $n = \frac{P V}{RT} = 0.00802$ mol. $Δ U = n C_{v} Δ T = \frac{P V}{T} \times 2.5 \times Δ T = 0.0667 \times 2.5 \times 165.6 = 27.6$ J.

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

⏱ 2mℹ️ Source: QB

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