Vapour Pressure of Water forming Immiscible Mixture with Liquid Calculator

Vapour Pressure Formula:

\[ P_{water} = \frac{W_{water} \times P_B° \times M_B}{W_B \times M_{water}} \]

Weight of Water:

Vapor Pressure of Pure Component B:

Molecular Mass of Liquid B:

kg/mol

Weight of Liquid B:

Molecular Mass of Water:

kg/mol

Partial Pressure of Pure Water (Pa):

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1. What is Vapour Pressure of Water in Immiscible Mixture?

Definition: This calculator determines the partial pressure exerted by water vapor when mixed with an immiscible liquid.

Purpose: It helps chemists and engineers understand the vapor pressure behavior in systems with immiscible liquids.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ P_{water} = \frac{W_{water} \times P_B° \times M_B}{W_B \times M_{water}} \]

Where:

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

Explanation: The formula calculates water's partial pressure based on the relative weights and molecular masses of the components.

3. Importance of Vapour Pressure Calculation

Details: Accurate vapor pressure calculations are crucial for distillation processes, environmental studies, and chemical engineering applications.

4. Using the Calculator

Tips: Enter the weights of water and liquid B, vapor pressure of component B, molecular masses (default 0.018 kg/mol for water). All values must be > 0.

5. Frequently Asked Questions (FAQ)

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

Q2: Why is molecular mass important?
A: Molecular mass affects how molecules distribute between liquid and vapor phases.

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

Q4: Can I use this for miscible liquids?
A: No, this formula is specifically for immiscible liquid systems.

Q5: What's the typical Mwater value?
A: Water's molecular mass is consistently 0.018 kg/mol (18 g/mol).