1. What is Henry's Law?

Henry's Law states that the amount of dissolved gas in a liquid is proportional to its partial pressure above the liquid. It describes the relationship between gas partial pressure and concentration in solution.

2. How Does the Calculator Work?

The calculator uses Henry's Law equation:

Where:

• \( P \) — Partial pressure of the gas (atm)
• \( H \) — Henry's constant (atm/M)
• \( C \) — Concentration of dissolved gas (M)

Explanation: The equation shows that the partial pressure of a gas above a solution is directly proportional to the concentration of the gas dissolved in the solution.

3. Importance of Henry's Law

Details: Henry's Law is crucial for understanding gas solubility, carbonation in beverages, gas exchange in lungs, environmental science, and industrial processes involving gas-liquid equilibria.

4. Using the Calculator

Tips: Enter Henry's constant in atm/M and concentration in M. Both values must be positive numbers for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What factors affect Henry's constant?
A: Temperature is the main factor - Henry's constant generally increases with temperature, meaning gas solubility decreases as temperature rises.

Q2: Does Henry's Law apply to all gases?
A: Henry's Law applies best to gases that do not react chemically with the solvent and at low to moderate pressures.

Q3: How is Henry's constant determined experimentally?
A: It's determined by measuring gas concentration in solution at known partial pressures and constant temperature.

Q4: What are typical units for Henry's constant?
A: Common units include atm/M, Pa·m³/mol, or bar/M, depending on the pressure and concentration units used.

Q5: When does Henry's Law not apply?
A: It may not apply at high pressures, for gases that chemically react with the solvent, or in concentrated solutions.