# Converting units of Area weighted average reaction rate

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 June 27, 2018, 18:27 Converting units of Area weighted average reaction rate #1 Member   Anomymous Join Date: May 2018 Posts: 31 Rep Power: 6 Hi all, I want to convert the area weighted average reaction rate's unit from Kgmol/m3-s to mol/m3-s, please suggest me how to do it, i.e., with what factor I should multiply it to convert it into the required unit, it seems we should divide it by Kg...but in my model I am using a species transport model, and have a total of 6 species, with one of them being the solvent, and also in my model I have 5 zones with different volumes..I tried calculating the value in the zone in which the reaction is taking place (by multiplying the volume with density), but the answer is very different from the value which I got. Can anyone please help me put in it. Thanks

 June 28, 2018, 14:18 #2 Senior Member   Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,112 Rep Power: 60 Be really careful, a 1 kgmol =1000*gmol, and in many usages 1 gmol = 1 mol

June 28, 2018, 14:34
#3
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Anomymous
Join Date: May 2018
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Quote:
 Originally Posted by LuckyTran Be really careful, a 1 kgmol =1000*gmol, and in many usages 1 gmol = 1 mol
Hi LuckyTran,

Yes that I am taking care of, but I am not sure with which species molar mass should we divide. The reaction I am modeling contains only one reactant, which forms some products, but by dividing the molecular weight if that species(reactant), the ans got is very different. So, that's why I am confused with what factor I should multiply. The species has a molar mass of 90 g/mol. Although, from ans provided it is pretty clear that the factor is 5....i.e., we should divide by 5 but why?

Thank you

August 19, 2019, 08:54
#4
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Abdullah Arslan
Join Date: Apr 2019
Posts: 94
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Quote:
 Originally Posted by Nishant_Sharma Hi LuckyTran, Yes that I am taking care of, but I am not sure with which species molar mass should we divide. The reaction I am modeling contains only one reactant, which forms some products, but by dividing the molecular weight if that species(reactant), the ans got is very different. So, that's why I am confused with what factor I should multiply. The species has a molar mass of 90 g/mol. Although, from ans provided it is pretty clear that the factor is 5....i.e., we should divide by 5 but why? Thank you
normally rection rates are given in mol/kg/s for gaseous reaction. To convert them to mol/m2/s we multiply it by catalyts loading (kg/m2) and to mol/m3/s we multiply it by catalyst density (kg/m3)