Question

A sample of he gas and o2 have the same temperature, pressure, and volume. Which gas has a greater number of collisions of gas molecules with the walls of the container?.

Answer 1

If a sample of He gas and O₂ have the same temperature, pressure, and volume then He gas will have more collisions.

This is because the He gas has less molecular mass then the oxygen gas and hence it can move more easily than oxygen thus will collide more with the walls of the container while being on the same temperature, pressure and volume as the oxygen gas. because of its low molecular mass it moves with the high average velocity than the oxygen gas and hence  the rate of its collision with the walls of the container ins more.

Thus the He gas will have more number of collisions then the Oxygen gas while having same temperature, pressure and volume.

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