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noted changes for Peng-Robinson gases and Pitzer

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David Parkhurst 2021-07-30 18:21:01 -06:00
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RELEASE.TXT
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Version @PHREEQC_VER@: @PHREEQC_DATE@
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July 30, 2021
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PHREEQC: Modified the numerical method for Pitzer calculations when using
Peng-Robinson gases. The calculation of numerical derivatives was
modified to account for the sequence of calculations, particularly that
the mole fractions of gases are calculated within the molalities method.
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June 14, 2021
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