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 is: (Given: Atomic weight of Ar = 39.9) [2023]

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Solution

Q.
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 $(K_{argon} / K_{hydrogen})$ is: (Given: Atomic weight of Ar = 39.9) [2023]

1 1

2 2

3 $\frac{39.9}{2}$

4 39.9

Ans.
(1)

$Average kinetic energy per molecule = \frac{3}{2} k T$

$\frac{K_{Ar}}{K_{H}} = \frac{1}{1}$

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