How to use the graham's law of effusion calculator
Compare effusion rates of two gases. Enter molar mass of gas 1, molar mass of gas 2 in the fields above; the rate ratio (gas 1 / gas 2) is computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “how fast does gas escape”, “diffusion rate ratio”, “helium vs oxygen”, “calculate graham's law of effusion”, “find rate ratio”.
Formula
Variables
- M1 — Molar mass of gas 1 (g/mol)
- M2 — Molar mass of gas 2 (g/mol)
Worked example
With molar mass of gas 1 = 4.003 g/mol, molar mass of gas 2 = 32 g/mol, the calculator gives rate ratio (gas 1 / gas 2) ≈ 2.827367.
Frequently asked questions
What is the graham's law of effusion calculator used for?
Compare effusion rates of two gases. It helps with questions such as “how fast does gas escape”, “diffusion rate ratio”, “helium vs oxygen”.
What is the formula for the graham's law of effusion calculation?
Rate ratio (gas 1 / gas 2) = √(M2 / M1). Here M1 is molar mass of gas 1 (g/mol), M2 is molar mass of gas 2 (g/mol).
What inputs do I need for the graham's law of effusion calculator?
You need molar mass of gas 1 in g/mol, molar mass of gas 2 in g/mol. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the graham's law of effusion calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the graham's law of effusion result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.