Answer:
V₂ = 16.8V₁
Explanation:
P₁ = 4.2L => P₂ = 1/2P₁ => Decreasing Pressure => Increases Volume
V₁ = V₁ => V₂ = ?
T₁ = T₁ => T₂ = 2T₁ => Increasing Temperature => Increases Volume
P₁V₁/T₁ = P₂V₂/T₂ => V₂ = P₁V₁T₂ / P₂T₁ = (4.2P₁)(V₁)(2T₁) / (P₁/2)(T₁) = 16.8V₁