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January 12th, 2018, 07:36 PM   #1
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Logarithmetric Differentiation

Dear all;

I have r = (KcoPcoKo2Po2)/(1+KcoPco+Ko2Po2)^2

It is the Langmuir Isotherm with Kco and Ko2 are the adsorption constant for CO and O2 gas, while Pco and Po2 are the CO and O2 gas partial pressure.

I need the derivatives of (d ln r)/(d ln Pco)

I start with

ln r = ln ((KcoPcoKo2Po2)/(1+KcoPco+Ko2Po2)^2)

It is correct? But I do not know how to continue

Please little help here

Thank You
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January 13th, 2018, 01:19 AM   #2
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