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Units For K

Posted: Sat Feb 20, 2016 12:43 pm
by Marla Dimetrios 3J
I know how to find the units for k, the equilibrium constant, when the orders for the reactants are whole numbers. However, I am confused as how to find the units when we have orders that are fractions? For instance, what would be the units for K, if the rate= K ?

Re: Units For K

Posted: Sat Feb 20, 2016 1:23 pm
by SubparChemist
Was wondering this too, is it possible to have a "partial rate order"?

Re: Units For K

Posted: Sat Feb 20, 2016 6:07 pm
by Peyton Van Riper 3J
The units for k would still be calculated from the overall rate order. In this example "rate=k[X]^1/4[Y]^1[Z]^1" the overall rate order would be 2 1/4 or 9/4 and so the units of k would be L^5/4 mol^5/4 s^-1, in order for the rate's units to be in mol L^-1 s^-1.