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.
Results
How it's calculated
Before you compare results
- Use the same temperature, volume, and pressure units in every scenario.
- For gas mixtures, enter either mol values or mass plus molar mass for each component.
- Use the wet-gas tab only when the sample was collected over water and needs vapour-pressure correction.
FAQ
How does the calculator apply Dalton’s law and show the steps?
Each component is normalised to moles, summed to find ntotal, and evaluated with Ptotal = nRT/V. The How it’s calculated panel logs ni, 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.
Which mode should I choose?
Use Ideal mix for Dalton's law in one vessel, Two tanks for isothermal mixing of separate containers, and Over water when a collected gas includes water vapour that must be subtracted.
What units can I use?
You can enter temperature in K or °C, choose L or m³ for volume, and display pressures in atm, bar, kPa, Pa, or mmHg.
Can I export or share a setup?
Yes. Export CSV downloads the current result table, and Copy link stores the selected mode and inputs in the page URL.