Total and Partial Pressure - Dalton's Law of Partial Pressures
Calculate total and partial pressures of gas mixtures using Dalton's Law of Partial Pressures. This tool determines the partial pressure of each component gas and the total pressure based on moles, temperature, and volume.
Dalton's Law of Partial Pressures
The total pressure of a gas mixture equals the sum of partial pressures:
Ptot = ∑Pi = P1 + P2 + P3 ...
Where:
- Ptot = total pressure
- Pi = partial pressure of component i
Using the Ideal Gas Law:
- Pi = (ni × R × T) / V
- Ptot = (ntot × R × T) / V
The mole fraction relationship:
- Xi = ni / ntot
- Pi = Xi × Ptot
Where:
- ni = moles of component i
- ntot = total moles
- R = 0.08206 (L·atm/mol·K)
- T = absolute temperature (K)
- V = volume (L)