An apparatus is available to show on the overhead projector the relationship of pressure and volume. A plot of V vs. 1/P gives a straight line with a slope of k. Take a series of measurements at ...

The Irish scientist Robert Boyle investigated the relationship between pressure and volume in the 17th century. He trapped a bubble of air at the sealed end of a J-shaped tube using liquid mercury.

So, for a fixed mass of gas at a constant pressure, volume ÷ temperature will remain the same. Boyle’s Law states that for a gas at a constant temperature, pressure × volume is also constant.