At 200C, NO2andN2O4 gases exist in equilibrium as shown in the equation below.2NO2(g)→←N2O4(g) ; = -ve Brown Pale yellowState and explain the observation that would be made when ;(a) A syringe containing the mixture at 200C is immersed in ice-cold water.(b) The volume of the gaseous mixture in a syringe is reduced.
Answer Text: (a) Observation :- Pale yellow colour intensifies.Reason:Forward reaction is exothermic hence lowering temperature shifts the equilibrium to the right.(b) Observation:Pale yellow colour intensifiesReason:Reducing the volume of syringe increases the pressure hence the equilibrium shifts to the right.