Assuming temperature is constant, what is the new volume when a 100.0 cm3 container at 120.0 kPa is expanded until the pressure is 60.0 kPa?

200cm³

Explanation:

Given parameters;

Initial volume  = 100cm³

Initial pressure = 120kPa

Final pressure  = 60kPa

Unknown:

Final volume  = ?

Solution:

The temperature is constant, we apply Boyle's law to solve this problem.

Boyle's states that "the volume of fixed mass of a gas varies inversely as the pressure changes, if the temperature is constant".

  Mathematically;

              P₁V₁  = P₂V₂

P and V are the pressure and volume

1 and 2 are the initial and final values;

 Now insert the parameters and solve;

             120 x 100  = 60 x V₂

                     V₂ = 200cm³