Partial Pressure using Henry Law Calculator

Partial Pressure Formula:

\[ p_{partial} = K_H \times x_{Liquid} \]

Partial Pressure (Pa):

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1. What is Partial Pressure using Henry Law?

Definition: This calculator determines the partial pressure of a gas in equilibrium with a liquid using Henry's Law.

Purpose: It helps chemists and engineers understand gas-liquid equilibrium systems, particularly in environmental and chemical engineering applications.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ p_{partial} = K_H \times x_{Liquid} \]

Where:

\( p_{partial} \) — Partial pressure of the gas (Pascal)
\( K_H \) — Henry's Law constant (Pa·m³/mol)
\( x_{Liquid} \) — Mole fraction of the component in the liquid phase (dimensionless)

Explanation: Henry's Law states that the amount of dissolved gas is proportional to its partial pressure above the liquid.

3. Importance of Partial Pressure Calculation

Details: Calculating partial pressure is essential for understanding gas solubility, designing chemical processes, and environmental studies of gas exchange.

4. Using the Calculator

Tips: Enter the Henry's Law constant (K_H) in Pa·m³/mol and the mole fraction in liquid phase (between 0 and 1). Both values must be positive.

5. Frequently Asked Questions (FAQ)

Q1: What is Henry's Law constant?
A: It's a proportionality constant that relates the partial pressure of a gas above a liquid to its concentration in the liquid.

Q2: What are typical values for K_H?
A: Values vary widely by gas and temperature. For example, CO₂ at 25°C has K_H ≈ 3.3×10^-4 Pa·m³/mol.

Q3: What does mole fraction represent?
A: It's the ratio of moles of the dissolved gas to total moles in the liquid solution.

Q4: When does Henry's Law apply?
A: For dilute solutions and gases that don't react chemically with the solvent.

Q5: How does temperature affect the calculation?
A: K_H is temperature-dependent - higher temperatures generally decrease gas solubility.