1. What is Henry's Law Constant?

Henry's Law Constant (H) is a measure of the solubility of a gas in a liquid. It represents the ratio of the partial pressure of the gas above the solution to the concentration of the gas in the solution at equilibrium.

2. How Does the Calculator Work?

The calculator uses Henry's Law equation:

Where:

• \( H \) — Henry's constant (atm·L/mol)
• \( P \) — Partial pressure of the gas (atm)
• \( C \) — Concentration of the gas in solution (mol/L)

Explanation: The constant quantifies how much gas dissolves in a liquid at a given pressure, with higher values indicating lower solubility.

3. Importance of Henry's Constant

Details: Henry's constant is crucial in environmental science, chemical engineering, and atmospheric chemistry for predicting gas solubility, designing separation processes, and understanding gas exchange between atmosphere and water bodies.

4. Using the Calculator

Tips: Enter partial pressure in atm and concentration in mol/L. Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What does a high Henry's constant indicate?
A: A high Henry's constant indicates low solubility of the gas in the liquid, meaning less gas dissolves at a given pressure.

Q2: How does temperature affect Henry's constant?
A: Henry's constant generally increases with temperature, meaning gas solubility decreases as temperature rises.

Q3: What are typical units for Henry's constant?
A: Common units include atm·L/mol, Pa·m³/mol, or dimensionless values depending on the concentration units used.

Q4: When is Henry's law applicable?
A: Henry's law applies to dilute solutions where the gas doesn't react with the solvent and at moderate pressures.

Q5: How is Henry's constant used in environmental science?
A: It's used to model gas exchange between atmosphere and oceans, predict contaminant transport in groundwater, and assess air quality.