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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermodynamics Laws & Specific Heats of GasesMedium2 minQB

PhysicsMediuminteger

A monoatomic gas at 1 atm, 5 litres and 300 K is compressed adiabatically to 1 litre. Find the increase in internal energy in joules (nearest integer; take 1 atm = $1 0^{5}$ Pa).

Answer:

1443

Solution:

$T_{2} = 300 \times 5^{\frac{2}{3}} = 877.2$ K and $P_{2} = 5^{\frac{5}{3}} = 14.6$ atm. $n = \frac{1 0 ^{5} \times 5 \times 1 0 ^{- 3}}{8.314 \times 300} = 0.2005$ mol. $Δ U = \frac{3}{2} n R Δ T = 1443$ J.

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

⏱ 2mℹ️ Source: QB

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