Boyle’s Law: pressure and volume are inversely related. If one goes up, the other goes down

(provided that V and n remain constant). As a gas is squeezed into a smaller volume, the molecules get closer together, so more molecules bump against each cm², thus raising the pressure.

Click here to see a simulation of how volume and pressure are related: Link Link

We can write Boyle’s Law this way: P₁V₁ = P₂V₂ where P₁V₁ are the beginning conditions, and P₂V₂ are the ending conditions

Example: if 400 ml of Helium at 5 atm has its pressure increased to 25 atm, what is the new volume?

We can write Boyle’s Law this way: P₁V₁ = P₂V₂ where P₁V₁ are the beginning conditions, and P₂V₂ are the ending conditions

Example: if 400 ml of Helium at 5 atm has its pressure increased to 25 atm, what is the new volume?

Now you try it. If 4 liters of air has a pressure of 105 kPa, what pressure would it have if it was squeezed into a 1.5 liter space? Answer