Van der Waals Calculator
Compute real-gas pressure P = nRT/(V−nb) − a n²/V².
Input Data
Input Moles n.
mol
Input Gas constant R.
J/(mol·K)
Input Temperature T.
K
Input Volume V.
m³
Input Attraction a.
Pa·m⁶/mol²
Input Exclusion b.
m³/mol
Results
100,543.1023Pa
P = nRT/(V−nb) − a n²/V² = 100543.1023 Pa
At a glance:Van der Waals Calculator: enter parameters to compute results; complements related calculators.
Formula
P = nRT/(V − nb) − a n²/V²
a: attraction, b: molecular volume
How to Use
- Enter n, R, T, V and gas constants a, b.
- Get real-gas pressure P.
Case Studies
Nitrogen (a=0.1408, b=3.91e-5)
1 mol, 300 K, 0.02479 m³ → P≈1.005×10⁵ Pa (below ideal).
FAQ
Where are a, b from?
From the gas critical point or experimental tables (e.g. N₂ values).
Related Tools
References
Content review: Calculatorism Science Team. Formula and numeric tests verified; results for reference only.