Total Pressure of Mixture of Water with Liquid given Vapour Pressure Calculator

Total Pressure Formula:

\[ P_{total} = P_B° + \left(\frac{W_{water} \times P_B° \times M_B}{W_B \times M_{water}}\right) \]

Vapor Pressure of Pure Component B:

Weight of Water in Mixture:

Weight of Liquid B:

Molecular Mass of Liquid B:

kg/mol

Molecular Mass of Water:

kg/mol

Total Pressure of Mixture: Pa

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1. What is Total Pressure of Mixture of Water with Liquid?

Definition: This calculator determines the total pressure exerted by a mixture of water with an immiscible liquid based on their weights, molecular masses, and vapor pressure.

Purpose: It helps in chemical engineering and physical chemistry to understand the behavior of immiscible liquid mixtures.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ P_{total} = P_B° + \left(\frac{W_{water} \times P_B° \times M_B}{W_B \times M_{water}}\right) \]

Where:

\( P_{total} \) — Total pressure of the mixture (Pa)
\( P_B° \) — Vapor pressure of pure component B (Pa)
\( W_{water} \) — Weight of water in the mixture (kg)
\( W_B \) — Weight of liquid B in the mixture (kg)
\( M_B \) — Molecular mass of liquid B (kg/mol)
\( M_{water} \) — Molecular mass of water (0.018 kg/mol)

Explanation: The total pressure is the sum of the vapor pressure of pure component B and the additional pressure contribution from the water component.

3. Importance of Total Pressure Calculation

Details: Understanding the total pressure of immiscible liquid mixtures is crucial for distillation processes, vapor-liquid equilibrium calculations, and chemical process design.

4. Using the Calculator

Tips: Enter the vapor pressure of pure component B, weights of both liquids, molecular masses (with water defaulting to 0.018 kg/mol). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is the molecular mass of water fixed at 0.018 kg/mol?
A: This is the standard molecular weight of water (18 g/mol converted to kg/mol).

Q2: What units should be used for input?
A: Use Pascals for pressure, kilograms for weights, and kg/mol for molecular masses.

Q3: Does this formula work for miscible liquids?
A: No, this formula is specifically for immiscible liquid mixtures.

Q4: How does temperature affect the calculation?
A: Temperature affects the vapor pressure value you input, but the formula itself is temperature-independent.

Q5: Can I use this for more than two immiscible liquids?
A: The formula would need to be extended to account for additional components.