Homework Help: Chemmistry gas laws

Posted by tori on Thursday, October 13, 2011 at 3:07pm.

CH2==Ch2(g) ----> CH4(g) + C (graphite)
If the decomposition begina at 10 degrees C and 50.0 atm with a gas density of 0.215 g/mL and the temperature increases by 950K, what is the final pressure of the confined gas (ignore the volume of graphite and use the van der waals equation)

Chemmistry gas laws - DrBob222, Thursday, October 13, 2011 at 3:19pm
So what's your problem? Just plug into the van der Waals equation.
Chemmistry gas laws - tori, Thursday, October 13, 2011 at 3:31pm
I don't know how to throw density into the equation.
Chemmistry gas laws - tori, Thursday, October 13, 2011 at 3:39pm
scratch that.. i really dont get any of it. formula I have is: (P + (n^2a)/V^2)(V-nb) = nRT

what I can fill in is (P + (n^2(2.25))/V^2)(V-n(.0428)) = n(.0821)(950)

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