The expression of the average speed of gaseous molecules is

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$\sqrt{8 R T / π M}$

$\sqrt{8 k_{B} T / π M}$

$\sqrt{2 R T / M}$

$\sqrt{3 R T / M}$

answer is C.

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Detailed Solution

The expression of the average speed of gaseous molecules is $\sqrt{8 R T / π M}$

Where,

m is the molar mass of the substance, expressed in kilograms

T is the temperature

R is the universal gas constant equal $8.3144598 \times 10^{- 2} L . b a r . K^{- 1} . m o l^{- 1}$

$π$ Is constant equal to 3.14

As the name implies, average speed is the sum of the speeds of gas molecules.

Hence the correct option is C

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