In thermodynamics, the bubble point is the temperature (at a given pressure) where the first bubble of vapor is formed when heating a liquid consisting of two or more components. Given that vapor will probably have a different composition than the liquid, the bubble point (along with the dew point) at different compositions are useful data when designing distillation systems.[1]
For a single component the bubble point and the dew point are the same and are referred to as the boiling point.
At the bubble point, the following relationship holds:
Nc | |
\sum | |
i=1 |
yi=
Nc | |
\sum | |
i=1 |
Kixi=1
Ki\equiv
yie | |
xie |
(yie)
(xie)
Ki=
P'i | |
P |
Given either of
xi
yi