memorizing GChem Constant value

[imju85]

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hey guys,
I hope everyone is studying hard.. (congrat on everyone who's done with their DAT...lucky you guys...)

I was doing some Gchem problems and I was wondering, am I responsible for memorizing all the Constants?
I think I should know R (gas constant, 0.0821), C (speed of light 3x10^8 m/s), 1 g/cal for water, Avogadro's number (6.022 x 10^23), F (96500 Columb/e- or mol--can't recall) etc..

But should i take my time to memorize Planick's constant (4.15 X10^-15 Ev x(s)or 6.626x10^-34 Jx(s)--depend on unit), 1 amu (=1.66x 10^-27kg)???

Feedback from nyone who already took DAT (and noticed any Qs that requires memorizing those number) will be very helpful!

thanks in advance!

 

[pbure9]

I think it very important that you are aware of the first 5 or so constants you mentioned, especially the gas constant R. It seems to always show up on prac tests and it showed up on the DAT.
Don't know about the other ones, but it couldn't hurt

Good luck with your studies!

 

[sketo43]

I definitely recommend memorizing R and avogadro's number - of the things you listed, I think those 2 are the most important, but c and F are probably good to know. I don't think it's necessary to memorize planck's constant or amu/kg, but I can't guarantee anything.

I suggest memorizing that at STP, 1 mol of gas is 22.4L. This also means that in PV=nRT problems, if the temp is 273K, then R*T = 22.4. Multiplying R and T is usually the biggest pain in these problems; P and V are usually easier to deal with. So I also memorized that at 298K, R*T = 24.4, and at 373K R*T=30.6. Those are the 3 most common temperatures. The reason I memorized these numbers wasn't because it's "necessary," but to save time on the test and to make calculations easier. Good luck!