One way to decrease the average speed of mole | vedclass

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(D) The average speed $(v_{avg})$ of gas molecules is given by the formula $v_{avg} = \sqrt{\frac{8RT}{\pi M}}$.From this relation,it is clear that $v

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Adiabatic expansion of the gas

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(D) The average speed $(v_{avg})$ of gas molecules is given by the formula $v_{avg} = \sqrt{\frac{8RT}{\pi M}}$.From this relation,it is clear that $v_{avg} \propto \sqrt{T}$.To decrease the average speed,the temperature $(T)$ of the gas must be decreased.In an adiabatic expansion of an ideal gas,the gas does work on the surroundings at the expense of its internal energy,which leads to a decrease in the temperature of the gas.Therefore,adiabatic expansion is the correct method to decrease the average speed of the molecules.

One way to decrease the average speed of molecules of an ideal gas is ............. .

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