Total Vapour Pressure of Mixture Calculator

Total Vapour Pressure of Mixture of given Partial Pressure of One Liquid Calculator

Total Pressure Formula:

\[ P = P_B^\circ + \left( \frac{P_B^\circ \times W_A \times M_B}{W_B \times M_A} \right) \]

Vapor Pressure of Pure Component B:

Weight of Liquid A:

Weight of Liquid B:

Molecular Mass of Liquid A:

kg/mol

Molecular Mass of Liquid B:

kg/mol

Total Pressure of Mixture:

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1. What is Total Vapour Pressure of Immiscible Liquids?

Definition: This calculator determines the total vapour pressure of a mixture of two immiscible liquids based on their weights, molecular masses, and the vapor pressure of one component.

Purpose: It helps chemists and engineers understand the behavior of immiscible liquid mixtures in various applications like distillation and extraction.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ P = P_B^\circ + \left( \frac{P_B^\circ \times W_A \times M_B}{W_B \times M_A} \right) \]

Where:

\( P \) — Total pressure of the mixture (Pa)
\( P_B^\circ \) — Vapor pressure of pure component B (Pa)
\( W_A \) — Weight of liquid A (kg)
\( W_B \) — Weight of liquid B (kg)
\( M_A \) — Molecular mass of liquid A (kg/mol)
\( M_B \) — Molecular mass of liquid B (kg/mol)

Explanation: The total pressure equals the vapor pressure of pure component B plus a term accounting for the contribution from component A based on their relative amounts and molecular weights.

3. Importance of Vapour Pressure Calculation

Details: Accurate vapor pressure calculations are crucial for designing separation processes, predicting boiling points, and understanding phase behavior in chemical systems.

4. Using the Calculator

Tips: Enter all required values in appropriate units. Ensure weights and molecular masses are positive values. The vapor pressure should be greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What are immiscible liquids?
A: Immiscible liquids are those that don't mix to form a homogeneous solution (like oil and water).

Q2: Why does the formula only need the vapor pressure of one component?
A: For immiscible liquids, each component contributes independently to the total pressure based on its pure vapor pressure and relative amount.

Q3: What units should I use?
A: Use consistent units - kg for weights, kg/mol for molecular masses, and Pa for pressures.

Q4: Can this be used for more than two liquids?
A: The current formula is for two liquids. For more components, the formula would need to be extended.

Q5: How does temperature affect the result?
A: Temperature affects the vapor pressure values, which should be measured at the temperature of interest.