Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoKTGEasy2 minPYQ_2023

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A flask contains Hydrogen and Argon in the ratio $2 : 1$ by mass. The temperature of the mixture is $30 ° C$ . The ratio of average kinetic energy per molecule of the two gases $(\frac{K_{argon}}{K_{hydrogen}})$ is: (Given : Atomic Weight of $A r = 39.9$ )

Options:

Answer:

Solution:

The formula to calculate the average kinetic energy per molecule of a gas at any temperature $T$ is given by
$K_{avg} = \frac{3}{2} k_{B} T$
where, $k_{B}$ is Boltzmann constant.
From above equation, it can be concluded that the average kinetic energy per molecule is independent of the molecular weight of the gas.
Hence, the required ratio is $1 : 1$ .

Stream:JEESubject:PhysicsTopic:Heat & ThermoSubtopic:KTG

⏱ 2mℹ️ Source: PYQ_2023

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