Graham's Law Calculator
Compute effusion rate ratio r₁/r₂ = √(M₂/M₁) of two gases.
Input Data
Input Gas 1 molar mass M₁.
kg/mol
Input Gas 2 molar mass M₂.
kg/mol
Results
3.790437
r₁/r₂ = √(M₂/M₁) = 3.790437
At a glance:Graham's Law Calculator: enter parameters to compute results; complements related calculators.
Formula
r₁ / r₂ = √(M₂ / M₁)
r: effusion rate, M: molar mass
How to Use
- Enter gas 1 molar mass M₁.
- Enter gas 2 molar mass M₂.
- Get rate ratio r₁/r₂.
Case Studies
H₂ vs air
M₁=0.002016, M₂=0.029 → ratio≈3.79; hydrogen effuses ~3.8× faster.
FAQ
Applies to diffusion?
Approximately; strict diffusion also depends on molecular collisions.
Related Tools
References
Content review: Calculatorism Science Team. Formula and numeric tests verified; results for reference only.