Answer:
Δn = 2.25 moles
Explanation:
given,
n₁ = 3 mol
initial volume = V
final volume = V/4
temperature is constant = ?
using ideal gas equation
[tex]\dfrac{P_1V_1}{n_1}=\dfrac{P_2V_2}{n_2}[/tex]
[tex]\dfrac{V}{3}=\dfrac{\dfrac{V}{4}}{n_2}[/tex]
[tex]n_2 = \dfrac{3}{4}[/tex]
n₂ = 0.75 moles
moles of gas allowed to escape
Δn = n₁ - n₂
Δn = 3 - 0.75
Δn = 2.25 moles
moles of gas allowed to escape is equal to Δn = 2.25 moles
