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Fugacities in a Can of Soda

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temperature (°C)
0
The fugacities of water and carbon dioxide are calculated as a function of temperature for a closed container modeled by a can of soda. The concentrations of the two components are calculated in both the liquid and the gas phases. As the temperature increases, the pressure increases, and therefore the fugacities increase. Note that the
CO
2
concentration is much lower than the
H
2
O
concentration in the liquid phase, but the
CO
2
concentration is much higher than the
H
2
O
concentration in the gas phase. Correspondingly, the
CO
2
fugacity is much higher than
H
2
O
fugacity. As the temperature increases, the pressure increases. Higher temperatures decrease the
CO
2
concentration in water, but higher pressures increase the
CO
2
concentration in water, so the net effect is that the
CO
2
concentration in the liquid phase does not change much.
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