Question

a gas occupies 20 litre of volume under STP what will be its volume if the pressure is increased 4 times keeping the temperature constant

Answer 1

heya here is your answer

Let pressure (P1)=x

pressure (P2)=4x

volume (V1)=20l

volume (V2)=?

Now by applying Boyle's law

P1*V1=P2*V2

=>x*20=4x*V2

=>V2=20x÷4x

=>V2=5 litre. (Ans)

........................

Answer 2

Answer: The volume will be 5 litres.

Explanation:

Given:

Volume $V_1$ at constant temperature with pressure $P_1$

$V_1=20 l,P_1= p$

$P_2=4p, V_2=?$at constant temperature

According to Boyle's law:

$P_1V1=P_2V_2$

$p\times 20 L=4p\times V_2$

$V_2=5L$

The volume of the gas will 5 L when pressure is increased four times.