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When heating a liquid consisting of two or more components, the bubble point is the point where first bubble of vapor is formed. Given that vapor will probably have a different composition to the liquid, the bubble point (along with the dew point) at different compositions are useful data when designing distillation systems. ## Calculating the bubble point

At the bubble point, the following relationship holds:

where

When Raoult's law and Dalton's law hold for the mixture, the K factor is defined as the ratio of the vapor pressure to the total pressure of the system:

## References

## See also

For single component mixtures the bubble point and the dew point are the same and are referred to as the boiling point.

- $sum\_\{i=1\}^\{N\_c\}\; y\_i\; =\; sum\_\{i=1\}^\{N\_c\}\; K\_i\; x\_i\; =\; 1.0$

where

- $K\_i\; equiv\; frac\{y\_\{ie\}\}\{x\_\{ie\}\}$.

When Raoult's law and Dalton's law hold for the mixture, the K factor is defined as the ratio of the vapor pressure to the total pressure of the system:

- $K\_i\; =\; frac\{P\text{'}\_i\}\{P\}$

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Last updated on Monday October 06, 2008 at 07:17:16 PDT (GMT -0700)

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This article is licensed under the GNU Free Documentation License.

Last updated on Monday October 06, 2008 at 07:17:16 PDT (GMT -0700)

View this article at Wikipedia.org - Edit this article at Wikipedia.org - Donate to the Wikimedia Foundation

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