Van der Waals Equation Calculator
Free calculate pressure, volume, or temperature using the van der waals equation for real gases. account for molecular size and intermolecular forces.
Input Parameters
Results
Enter parameters to calculate pressure
Van der Waals Equation
Van der Waals Equation
(P + a(n/V)²)(V - nb) = nRT
Where a = attraction parameter, b = volume parameter
Solving for Pressure
P = (nRT)/(V - nb) - a(n/V)²
Most common calculation
Constants
- • R = 8.314 J/(mol⋅K)
- • a accounts for intermolecular forces
- • b accounts for molecular volume
Common Gas Constants
- • H₂: a=0.0247, b=0.0000266
- • N₂: a=0.1408, b=0.0000391
- • CO₂: a=0.3640, b=0.0000427