A gas is at constant temperature with an initial pressure of 2 ATM and volume of 600 ml is allowed to expand until it reaches a final volume of 2400 ml. What is the new pressure acting on the gas?

Let's use Boyle's Law to write this in a mathematical equation. The formula for Boyle's Law is:

Where P₁ = 1^st pressure



V₁ = 1^st volume



P₂ = 2^nd pressure



V₂ = 2^nd volume

First, write down all the pieces of the equation by filling in the information from the problem. Click on the blanks to check your answers.



We know P₁ = _____ 2 atm

V₁ = _____ 600 ml



V₂ = _____ 2400 ml



Solve for P₂.

Now let's use the numbers to complete the equation.

Click here to see the equation. (2 atm) * (600 ml) = (P₂) * (2400 ml)

Isolate P₂:

P₂ = numerator: 2ATM times 600ml, denominator: 2400ml 2ATM * 600ml 2400ml = numerator: 1200ATM ml, denominator: 2400ml 1200ATM ml 2400ml

P₂ = 0.5ATM

The final pressure of the gas.

Now for more practice, go to the following activity:

Sample Boyle's Law Problems and work through the Sample Boyle's Law Problems.