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Author Topic: Coefficient A in Davies equation  (Read 762 times)

peterwadeuk

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Coefficient A in Davies equation
« on: July 10, 2017, 03:22:39 PM »
Greetings good people,

I am attempting to calculate activity coefficients for aqueous reactions.

I understand that the Davies equation is the default equation for calculating the activity coefficients.

The Davies equation uses a coefficient "A" that I can't find in the database.

Is this a parameter that is embedded in the program or that is well-known?

All the best,
Peter
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dlparkhurst

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Re: Coefficient A in Davies equation
« Reply #1 on: July 10, 2017, 03:38:20 PM »
It is relatively well known as a function of temperature. Its value is about 0.51 at 25C. You can print the value with the Basic function DH_A.
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peterwadeuk

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Re: Coefficient A in Davies equation
« Reply #2 on: July 11, 2017, 10:17:04 AM »
Thank you David
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