Question

If `18 L` of a gas at room temperature exerts a pressure of `15 kPa` on its container, what pressure will the gas exert if the container's volume changes to `27 L`?

Answer 1

Use Boyles Law.

Explanation:

Boyles Law states that pressure is inversely proportional to volume, or as the pressure of a gas increases, the volume of the gas decreases. Mathematically, it can be stated as:

`P_1V_1 = P_2V_2`

In this problem, `P_1 = 15kPa`, `V_1=18L`, `P_2=?` and `V_2=27L`

`(15)(18)=P_2(27)`

Divide both sides by 27

`P_2 = (15*18)/27`

`P_2=10kPa`