Calculates the pressure, volume, temperature, or number of moles of a real gas using the van der Waals equation of state.
Start with your values, or try a preset.
Enter Pressure (P), Volume (V), Temperature (T), Number of Moles (n), van der Waals constant a, van der Waals constant b, and Calculate in the units shown.
Read Result, Unit, and Calculated Value in the results panel. Results update as you change the inputs.
Choose a preset to load an example, then adjust the values for your situation.
See the inputs and their calculated results.
Pressure (P): 1 atm; Volume (V): 22.4 L; Temperature (T): 273.15 K; Number of Moles (n): 1 mol; van der Waals constant a: 0 L² atm / mol²; van der Waals constant b: 0 L / mol; Calculate: Pressure (P)
Result: Pressure (P); Unit: atm; Calculated Value: 1.001143527 See below
Pressure (P): 1 atm; Volume (V): 22.25 L; Temperature (T): 273.15 K; Number of Moles (n): 1 mol; van der Waals constant a: 3.592 L² atm / mol²; van der Waals constant b: 0.0427 L / mol; Calculate: Pressure (P)
Result: Pressure (P); Unit: atm; Calculated Value: 1.002575127 See below
Pressure (P): 1 atm; Volume (V): 22.06 L; Temperature (T): 273.15 K; Number of Moles (n): 1 mol; van der Waals constant a: 4.17 L² atm / mol²; van der Waals constant b: 0.0371 L / mol; Calculate: Pressure (P)
Result: Pressure (P); Unit: atm; Calculated Value: 1.009717294 See below
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