Pressure & Volume — Boyle's Law

P₁V₁ = P₂V₂ = constant At constant temperature, pressure × volume is constant for a fixed mass of gas.

P–V Graph

Click "Record Data Point" to plot points. The dashed curve shows the theoretical relationship.

Controls

Current Measurements

Volume

500 cm³

Pressure

200.0 kPa

P × V

100 000 kPa·cm³

Data Table

# V (cm³) P (kPa) P × V
No readings yet.

Instructions:

  1. Move the Volume slider to compress or expand the gas
  2. Observe the animated particles and pressure reading
  3. Record data points at 5–6 different volumes
  4. Check the P × V column — it should stay approximately constant
  5. Look at the shape of the P–V graph — it should be a curve (inverse proportion)
  6. Extension: What would the graph look like if you plotted P against 1/V?
Data point recorded!