Question

Following reaction was carried out at 300 K.

2SO₂(g) + O₂ (g) → 2SO₃(g)

How is the rate of formation of SO₃ related to the rate of disappearance of O₂ –

(a) -Δ[O₂]/Δt  = +1/2Δ[SO₃]/Δt 

(b) -Δ[O₂]/Δt = Δ[SO₃]/Δt 

(c)  -Δ[O₂]/Δt = 1/2Δ[SO₃]/Δt 

(d) None of these

Answer 1

Correct Option (a) -Δ[O₂]/Δt  = +1/2Δ[SO₃]/Δt 

Explanation:

 Rate of reaction = -1/2Δ[SO₂]/Δt  = -Δ[O₂]/Δt = +1/2Δ[SO₃]/Δt

Therefore, rate of disappearance of O₂ is related to rate of formation of SO₃ as -

Δ[O₂]/Δt  =  +1/2Δ[SO₃]/Δt