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Coefficient A in Davies equation
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Topic: Coefficient A in Davies equation (Read 381 times)
peterwadeuk
Frequent Contributor
Posts: 17
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
Top Contributor
Posts: 1064
Re: Coefficient A in Davies equation
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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
Frequent Contributor
Posts: 17
Re: Coefficient A in Davies equation
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Reply #2 on:
July 11, 2017, 10:17:04 AM »
Thank you David
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Coefficient A in Davies equation