Question

A container holds 1 mole of helium gas. The volume of the container is 2 liters and the pressure inside the container is 105.0 kPa. If the volume of the container is decreased to 1.5 liters, what will be the new pressure inside the container?

Answer 1

The new volume inside the container is calculated using the Boyles law formula

that is P1V1=P2V2
P1 =105.0 kpa
V1 = 2 L
V2= 1.5 L
P2=?
by making P2 the subject of the formula P2 = P1V1/V2

= (105.0 kpa x 2 L)/ 1.5 L = 140 KPa is the new pressure inside the container