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Gas Constant, R

Posted: Sun Feb 11, 2018 9:43 pm
by torialmquist1F
Will we ever need to use one of the other gas constants given on the constants/equations sheet for the midterm or only the 8.314 one?

Re: Gas Constant, R

Posted: Sun Feb 11, 2018 9:47 pm
by Nishma Chakraborty 1J
I don't know for sure, but I've used 8.314 J/(molK) for the most part this quarter. However, some practice problems have used the 0.08206 (L*atm)/(molK), so honestly I'd check to see if my units cancel just to be safe. Hope this helps!

Re: Gas Constant, R

Posted: Sun Feb 11, 2018 9:47 pm
by Nickolas Manipud 1C
Some problems from the homework required using 8.206 x 10^-2

Re: Gas Constant, R

Posted: Mon Feb 12, 2018 6:10 pm
by Justin Chang 2K
I agree, always make sure that you check your units of everything else before deciding what value of R to use.

Re: Gas Constant, R

Posted: Mon Feb 12, 2018 7:49 pm
by Chris Lamb 1G
These values are all equivalent, they are just in different units. Depending on the units of the given information, these other values can be very helpful.

Re: Gas Constant, R

Posted: Mon Feb 12, 2018 8:21 pm
by LMendoza 2I
It depends on the formula you use and the units within the formula you use and values you are given.

Re: Gas Constant, R

Posted: Mon Feb 12, 2018 8:36 pm
by AtreyiMitra2L
We often use 0.0821 when calulating with PV = nrT. For the others, it is possible I suppose.