[CHM 112] R value

[Andrew J. Pounds]

On 07/25/13 17:33, Maria Marie Philip wrote:
>
> Hey Dr. Pounds,
>
> What's the best way to remember when to use .08206 OR 8.314 for R?
>
> I keep getting confused when I need to use which number.
>
> Thank you!
>

Use 0.08206 whenever you are dealing with Gas Law problems (units of 
Liters, Atmospheres, Degrees, and Moles).  Use the other R whenever you 
are dealing with energy in SI units (Joules, degrees, moles). Remember 
that when computing the velocity of gas molecules you have to use R in 
the SI units (because a Joule is a kg/(m sec^2).


-- 
Andrew J. Pounds, Ph.D.  (pounds_aj at mercer.edu)
Professor of Chemistry and Computer Science
Mercer University,  Macon, GA 31207   (478) 301-5627
http://faculty.mercer.edu/pounds_aj

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