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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermodynamics Laws & Specific Heats of GasesMedium2 minQB

PhysicsMediumnumerical

Gaseous hydrogen contained initially under standard conditions in a sealed vessel of volume $V = 5.0$ litre was cooled by $Δ T = 55$ K. Find how much the internal energy of the gas will change and what amount of heat will be lost by the gas.

Answer:

0.25

Solution:

$n = \frac{5.0}{22.4} = 0.223$ mol. $Δ U = n C_{v} Δ T = 0.223 \times \frac{5}{2} \times 8.314 \times (- 55) = - 255$ J. The vessel is sealed ( $W = 0$ ), so the heat lost is also 255 J.

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

⏱ 2mℹ️ Source: QB

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