Gas Laws Calculator — Ideal Gas Law & Van der Waals Real-Gas Simulator

Topics Covered

• ✓PV = nRT solved for P, V, n, or T
• ✓Van der Waals equation (P + an²/V²)(V − nb) = nRT
• ✓Intermolecular attraction (a) vs excluded volume (b) corrections
• ✓Percent deviation from ideal behavior
• ✓STP and molar volume (22.4 L/mol)
• ✓Pressure-volume isotherm comparison

How to Use

1. 1Use the Ideal Gas Law Calculator tab to solve for P, V, n, or T
2. 2Switch to the Van der Waals tab and pick a real gas
3. 3Set moles, temperature, and volume to see the ideal vs real pressure gap and the worked calculation for both

Curriculum Alignment