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Standard XIII

Physics

Root Mean Square Speed

Assume a gas ...

Question

Assume a gas $X$ is enclosed in an insulated container [no heat exchange]. Now, suppose the collisions are no more elastic. What would happen to the rms speed of the gas with the passage of time?

It will remain constant.

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It will decrease.

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It will increase.

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It will increase first and then it wil decrease.

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Solution

The correct option is B It will decrease.
As the collisions are not elastic, the speed of the molecules will decrease after each collision. Hence, rms velocity decreases.

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Root Mean Square Speed

Standard XIII Physics

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Assume a gas X is enclosed in an insulated container [no heat exchange]. Now, suppose the collisions are no more elastic. What would happen to the rms speed of the gas with the passage of time?

The correct option is B It will decrease. As the collisions are not elastic, the speed of the molecules will decrease after each collision. Hence, rms velocity decreases.

Assume a gas $X$ is enclosed in an insulated container [no heat exchange]. Now, suppose the collisions are no more elastic. What would happen to the rms speed of the gas with the passage of time?

The correct option is B It will decrease.
As the collisions are not elastic, the speed of the molecules will decrease after each collision. Hence, rms velocity decreases.