David,
> What's the difference between what you did and what I did? Also, I don't
What does the manual say about EQUILIBRIUM_PHASES?
The manual says EQUILIBRIUM_PHASES is a way to input what the chemical saturation indices and concentrations will be at equilibrium. The output is the changes that must occur to reach this particular equilibrium.
Do you know what saturation indices are?
Saturation indices are the log of the ratio of the activity product of the compound to the solubility product constant of that same compound. The saturation idices have uses in determining whether something will precipitate out in water or not and, in some cases, how much will precipitate out.
What are the differences between these three simulations? SOLUTION 1 EQUILIBRIUM_PHASES 1 Calcite 0 10 CO2(g) -2.0 10 END SOLUTION 2 EQUILIBRIUM_PHASES 2 Calcite -1 10 CO2(g) -2.0 10END
The differences between these two simulations are the changes in the saturation indices in the calcite at equilibrium. The concentrations stay the same.
SOLUTION 3 EQUILIBRIUM_PHASES 3 Calcite 0 0 CO2(g) -2.0 10 ENDThis third simulation is the again changes the satruation index of the calcite. The concentration is the same because the default is 10 moles.
> Then, the final question is, after the sea water and ground water
interaction have been taken care of, do I use equilibrium phases to add in the limestone aquifer interaction? Thank you again for your help! You tell me what you think and I'll comment.Please note that some U.S. Geological Survey (USGS) information accessed through this page may be preliminary in nature and presented prior to final review and approval by the Director of the USGS. This information is provided with the understanding that it is not guaranteed to be correct or complete and conclusions drawn from such information are the sole responsibility of the user.
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