Question

2HI(g) → H2(g) + I2(g), Write the expression for average rate of a  reaction with respect to reactants for the reaction.​

Answer 1

Rate=− Δ[H 2]/Δt =− Δ[I 2]/Δt =+1/2 Δ[HI]/Δt

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Answer 2

Expression for average rate: -Δ1/2[HI] /Δt; where t is the time taken.

What is the rate of reaction?

• The ratio of the concentration of the reactant to the total time taken.
• Rate = [change in concentration] / total time taken.

• Rate = -[change in concentration of reactants]/ time taken.

                =  [change in concentration of products]/ time taken.

Therefore, for the reaction,

• 2HI(g) → H2(g) + I2(g)
• Rate in term of reactants= -Δ1/2[HI] /Δt;