The overall gas phase reaction 3A --> B + 2C occurs via the following sequence of elementary steps 2A <--> I1 + B k1,k2 A + I1 --> 2I2 k2 I2 --> C k3 1. write an expression for the overall reaction rate, r, in terms of the rate step 3, r3 2. using the answer from 1, obtain an expression for the reaction rate, r, in terms of rate constants and concentrations of reactants and products, only use PSSH. 3. State the. specific inequality the must be satisfied for each of the following assumptions to hold, and use it to simplify the general rate expression from question 2. i) Step 1 is quasi-equilibrium ii) Step 1 is irreversible

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Chapter1: Chemical Foundations
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The overall gas phase reaction 

3A --> B + 2C

occurs via the following sequence of elementary steps

2A <--> I1 + B    k1,k2

A + I1 --> 2I2        k2

I2 --> C               k3

1. write an expression for the overall reaction rate, r, in terms of the rate step 3, r3

2. using the answer from 1, obtain an expression for the reaction rate, r, in terms of rate constants and concentrations of reactants and products, only use PSSH.

3. State the. specific inequality the must be satisfied for each of the following assumptions to hold, and use it to simplify the general rate expression from question 2.

        i) Step 1 is quasi-equilibrium

        ii) Step 1 is irreversible

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