Dew Temperature Calculations
This page introduces dew point temperature calculations for the acetonitrile-nitromethane mixture. It presents an example problem to determine the temperature T and liquid composition x1 at a given pressure and vapor composition.
The dew point calculation process is explained, including:
- The governing equations for vapor-liquid equilibrium
- The relationship between vapor and liquid compositions
- The iterative approach needed to solve for temperature
Definition: Dew point temperature is the temperature at which the first droplet of liquid forms when cooling a vapor mixture at constant pressure.
Highlight: The dew point calculation uses a similar iterative approach to the bubble point calculation, but with different initial assumptions and equations.
The page outlines a sample iteration procedure, starting with an assumed temperature of 75°C and demonstrating the calculations for the relative volatility, vapor pressures, and temperature correction.
Vocabulary: Relative volatility - A measure of the difference in volatility between two components in a mixture, calculated from the ratio of their vapor pressures.
This explanation of dew point temperature calculations complements the earlier discussion on bubble point temperatures, providing a comprehensive view of phase equilibrium calculations for binary mixtures.