Chemistry - Gas Laws - Combined gas law - Three Laws Become One

Step-by-step derivation of combined gas law. Step 1: 'We've learned three separate laws: Boyle's: P₁V₁ = P₂V₂ (T constant). Charles's: V₁/T₁ = V₂/T₂ (P constant). Gay-Lussac's: P₁/T₁ = P₂/T₂ (V constant).' Step 2: 'COMBINE them all: (P₁V₁)/T₁ = (P₂V₂)/T₂. This works when P, V, AND T all change simul