Question

A gas has a volume of 60dm³ when it is under a pressure of 30kpa. Calculate it's volume when pressure changes

Answer 1

Explanation:

Given that,

Initial volume = 60dm³

Initial pressure = 30 kPa

We need to find the new volume when pressure changes to 40 kPa (say).

We know that the mathematical relation between volume and pressure is given by :

$\dfrac{P_1}{P_2}=\dfrac{V_2}{V_1}$

Put all the values,

$V_2=\dfrac{P_1V_1}{P_2}\\\\V_2=\dfrac{30\times 60}{40}\\\\V_2=45\ dm^3$

So, when pressure of the gas increases, its volume get decreased.