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January 12th, 2018, 08:36 PM  #1 
Newbie Joined: Nov 2017 From: Malaysia Posts: 9 Thanks: 0  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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