Henrys Law Calculator helps determine the concentration of a gas dissolved in a liquid based on the gas’s partial pressure and Henry’s Law constant. The formula used is:
C = k * P
Where:
- C represents the concentration of the gas in the liquid, typically measured in mol/L or Molarity.
- k is Henry’s Law constant, specific to the gas-liquid system and dependent on concentration and pressure units.
- P signifies the partial pressure of the gas above the liquid, usually in atmospheres or bar.
Here are some common Henry’s Law constants at 25°C:
- Carbon dioxide (CO2): Approximately 3.3 x 10^-2 M/atm
- Oxygen (O2): Approximately 4.0 x 10^-3 M/atm
- Nitrogen (N2): Approximately 6.8 x 10^-4 M/atm
- Hydrogen (H2): Approximately 7.1 x 10^-3 M/atm
- Ammonia (NH3): Approximately 5.6 x 10^1 M/atm
- Chlorine (Cl2): Approximately 1.0 x 10^2 M/atm
General Terms Table
| Gas | Henry’s Law Constant (M/atm) |
|---|---|
| CO2 | 3.3 x 10^-2 |
| O2 | 4.0 x 10^-3 |
| N2 | 6.8 x 10^-4 |
| H2 | 7.1 x 10^-3 |
| NH3 | 5.6 x 10^1 |
| Cl2 | 1.0 x 10^2 |
Example of Henrys Law Calculator
For instance, if the partial pressure of CO2 above a liquid is 2 atm, the concentration of CO2 in the liquid would be:
C = 3.3 x 10^-2 M/atm * 2 atm = 6.6 x 10^-2 M
Most Common FAQs
A: Henry’s Law helps describe how gases dissolve in liquids, crucial in understanding processes like gas exchange in biology or chemical reactions in environmental studies.
A: Yes, Henry’s Law constant is temperature-dependent; it generally increases with decreasing temperature.
A: The calculation provides a good estimation but might vary due to factors like temperature, pressure changes, or solute-solvent interactions.