DAT Destroyer 2010: G-Chem question #38

[fasho785]

Which statement is false?

A. Kr has a lower average speed than Ne at the same temperature.
B. The molecules of a gas undergo many collisions with each other and with the walls of the container.
C. Deviations from the ideal gas law are greater at low temperature and high pressure.
D. All molecules of an ideal gas have the same kinetic energy at constant temperature.
E. All are true.

I know for sure that A-C are true, and I though D was also true but the back of the book says D is false. I don't understand why though, it doesn't explain it very well. I was wondering if someone here can help explain it better. Thanks in advance.

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[Kahr]

Your answer can be found here:

http://forums.studentdoctor.net/showthread.php?t=905366&highlight=destroyer+question

It's the same question, but in the 2011 edition, someone had the same question as you looks like. Enjoy and good luck.

 

[noj mov]

I think it's wrong b/c it's not "average" kinetic energy

 

[biomolecmed]

the choice D would be true if it said Average kinetic energy, not kinetic energy.

 

[dental13]

the choice D would be true if it said Average kinetic energy, not kinetic energy.

Yes biomolecmed is right, it must state AVERAGE kinetic energy to be a correct statement. "Kinetic Average" it-self is just referring to its average speed, just like choice A.