For the first part of my lab, I have a graph with pressure(atm) as a function of temperature(K).(adsbygoogle = window.adsbygoogle || []).push({});

For the second part of my lab, I have a graph with pressure(atm) as a function of inverse volume(mL^-1)

For both of these, i am supposed to find the value for R, the gas constant.

So far far part a i have: PV = nRT

P = (nR/V)T (in the form y = mx +b),

So the slope of my graph is nR/V

I also know that n is kept constant, because it was a closed system and 1mol= 22.4L. And that the initial volume is 20mL.

And i think I should I pick two points on the line to find the slope and set that equal to nR/V.

And this is where i'm having trouble, i get some value for the slope, m, so

m = nR/V

R = mV/n, here i'm confused at how to find V and n in order to solve for R.

For part b; PV = nRT

P = (nRT) 1/V

So the slope of my graph is nRT

I did the same thing as part one;

m = nRT

R = m/nT, since T was not chnged, I can do that part, but once again, I am confused by finding n.

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# Homework Help: Ideal Gas law lab

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