Pressure
and Volume



P= pressure V=volume 

We can conduct an experiment in the classroom to investigate this law but for now we will conduct a simple virtual experiment. Using 1kg bricks to apply pressure on the plunger of a glass syringe we will measure the resulting volume and plot the data on a set of axis.. Click to run the experiment. 

We can manipulate the expression on the right to form PV = K 

OK so how do we
use this formula? .Let's try some examples. We will use SI units so pressure will be kPa and volume is in litres. 

A fixed amount of gas was placed in a 10 litre vessel at a pressure of 101.3kPa. The tap was opened and the gas was allowed to flow freely into another 5 litre chamber as shown on the left. Calculate the
final pressure inside the vessel if the temperature was kept constant. 
