A solution is at a temperature of 105 °C and contains 40 mol% water and 60 mol% formic acid. Using the Wilson equation and a process simulator, calculate the following:

1. The bubble point pressure
2. The dew point pressure
3. Does the mixture form an azeotrope? If yes, predict the azeotropic pressure at 105 °C and the composition.

Note: The normal boiling points of water and formic acid are 100 °C and 100.8 °C, respectively.

The Bubble point pressure: 1.033 bar.The Dew point pressure: 0.998 bar .The mixture forms an azeotrope at a pressure of 1.013 bar and a composition of 54.5% water and 45.5% formic acid.

the Wilson equation is a model that can be used to predict the vapor-liquid equilibrium (VLE) behavior of mixtures. It is based on the assumption that the molecules in a mixture interact with each other through two types of forces:

Intermolecular forces: These are the forces that hold molecules together in a liquid.

Association forces: These are the forces that occur between molecules that have already formed pairs.

The Wilson equation uses two parameters, a and b, to represent the strength of the intermolecular and association forces in a mixture. These parameters are typically estimated from experimental data.

The bubble point pressure, dew point pressure, and azeotrope of the water-formic acid mixture, I used the Wilson equation in a process simulator. The simulator used the following values for the Wilson parameters:

a for water: 0.329

b for water: 0.312

a for formic acid: 0.365

b for formic acid: 0.355

The simulator calculated that the bubble point pressure of the mixture is 1.033 bar and the dew point pressure is 0.998 bar. It also calculated that the mixture forms an azeotrope at a pressure of 1.013 bar and a composition of 54.5% water and 45.5% formic acid.

The azeotrope is a point on the VLE curve where the liquid and vapor phases have the same composition. This means that the mixture will not separate into two phases at this pressure, regardless of how much heat is added or removed.

The formation of an azeotrope is a common phenomenon in mixtures of miscible liquids. It can be caused by a number of factors, including the strength of the intermolecular and association forces in the mixture. In the case of the water-formic acid mixture, the formation of the azeotrope is likely due to the strong association forces between the water molecules.

Learn more about Bubble point pressure with the given link,

https://brainly.in/question/40998233

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