Welcome,
Guest
. Please
login
or
register
.
Did you miss your
activation email
?
1 Hour
1 Day
1 Week
1 Month
Forever
Login with username, password and session length
Forum Home
Login
Register
PhreeqcUsers Discussion Forum
»
Beginners
»
PHREEQC Basics
»
Coefficient A in Davies equation
« previous
next »
Print
Pages: [
1
]
Go Down
Author
Topic: Coefficient A in Davies equation (Read 446 times)
peterwadeuk
Frequent Contributor
Posts: 22
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
Logged
dlparkhurst
Top Contributor
Posts: 1130
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.
Logged
peterwadeuk
Frequent Contributor
Posts: 22
Re: Coefficient A in Davies equation
«
Reply #2 on:
July 11, 2017, 10:17:04 AM »
Thank you David
Logged
Print
Pages: [
1
]
Go Up
« previous
next »
PhreeqcUsers Discussion Forum
»
Beginners
»
PHREEQC Basics
»
Coefficient A in Davies equation