Partial pressure & gas mixing (with steps) — Dalton's law, two-tank mixing, wet gas, van der Waals

Q: How does the calculator apply Dalton’s law and show the steps?

Every entry is converted to moles, summed to obtain n_total, and evaluated with P_total = nRT/V. The How it’s calculated panel records n_i, mole fractions, ideal versus corrected pressure, and all partial pressures so you can cite the process in lab notes or lessons.

Q: Can it compare van der Waals, two-tank mixing, and over-water corrections?

Yes. Switch tabs to mix two tanks isothermally, subtract water vapour pressure from wet gas readings, and toggle the van der Waals correction. Each run supports CSV export, a copyable URL, and an accessible step-by-step log.

Set up the scenario

Load ready-made examples or enter your own tanks. Inputs persist in the share link so you can reopen the same configuration in any language.

Temperature

Volume

Pressure unit

Options

Real gas (van der Waals)

Gas	Type	mol	g	MW

Final temperature

Pressure unit

Tank A

Volume

Gas	Type	mol	g	MW

Tank B

Volume

Gas	Type	mol	g	MW

Result

How it's calculated

FAQ

How does the calculator apply Dalton’s law and show the steps?

Each component is normalised to moles, summed to find n_total, and evaluated with P_total = nRT/V. The How it’s calculated panel logs n_i, mole fractions, ideal versus corrected pressure, and every partial pressure so you can cite the workflow in lab notes or lessons.

Can it compare van der Waals, two-tank mixing, and over-water corrections?

Yes. Use the tabs to mix two tanks isothermally, remove water vapour from wet gas measurements, and toggle the van der Waals correction. Every run supports CSV export, a copyable URL, and an accessible step-by-step log.

Set up the scenario

Result

How it's calculated

FAQ

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