Destroyer Gchem question 38

[silveryhair]

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Can someone explain why this is false?

All molecules of a ideal gas have the same kinetic energy at a constant temperature?

I thought at a constant temperature, molecules and compounds would have the same speed and temperature?

Thanks!

 

[luv8724]

Can someone explain why this is false?

All molecules of a ideal gas have the same kinetic energy at a constant temperature?

I thought at a constant temperature, molecules and compounds would have the same speed and temperature?

Thanks!

-They have same average Kinetic energy under constant pressure.
-They have different VELOCITY (Speed) due to their difference in atom size (MW - this is per mole)
-They have different densities

 

[Baylor2011]

As person before me said and I believe it needs repeating. They have the same average kinetic energy...but many different kinetic energies in the reaction vessel, and velocity is different from kinetic energy - is related to MW..a gas that has a lighter MW will have a faster velocity

 

[KristopherTruth]

I actually thought it was D and it came out to be that but I thought to myself as I was answering the question "If D is false, then wouldn't E have to be false?" So I went to the back of the book and D was false but the question and an odd question with respect to the answer choices. I mean, if one question is false than the statement " All statements are true" is false as well. So there are two false answers.