Chemistry Forum

Hello, i have problem to find dV/dp, when I have this task:
Find the distribution function of the pore volume Dv (r) in the sample as a function of the pore radius based on the measurement made on the mercury porosimeter.
p -pressure (psia) Volume(cm3)
50 0,085
200 0,142
500 0,251
1000 0,33
5000 0,461
10000 0,633
15000 0,772
20000 0,825
30000 0,860
40000 0,862
50000 0,863
60000 0,863
I find r by Washburn's equation: r=106,7/p
Dv(r)=p/r*dV/dp

I think you have to calculate each dP and dV and draw it as function.
200- 50 = 150 and 0,142-0,085 = 0,057
500- 200 = 300 and 0,251 -0,142 = 0,109
and so one

Thank you.
I done it, but i dont what else