Total Pressure Formula:
From: | To: |
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.
The calculator uses the formula:
Where:
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.
Details: Accurate vapor pressure calculations are crucial for designing separation processes, predicting boiling points, and understanding phase behavior in chemical systems.
Tips: Enter all required values in appropriate units. Ensure weights and molecular masses are positive values. The vapor pressure should be greater than zero.
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.