Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoDifferent processesEasy2 minPYQ_2019

PhysicsEasysingle choice

A cylinder with fixed capacity of $67.2$ litre contains helium gas at STP. The amount of heat needed to raise the temperature of the gas by $20 ° C$ is:
[Given that $R = 8.31 J m o l^{- 1} K^{- 1}]$

Options:

Answer:

Solution:

The amount of heat supplied is
$Q = n C_{V} Δ T$
$= (\frac{67.2}{22.4}) (\frac{3 R}{2}) 20$
$= 3 \times \frac{3}{2} \times 8.314 \times 20$
$= 748 J$

Stream:JEESubject:PhysicsTopic:Heat & ThermoSubtopic:Different processes

⏱ 2mℹ️ Source: PYQ_2019

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