Problem: Consider the gas-phase reaction: H2(g) + I2(g) → 2 HI(g)The reaction was experimentally determined to be first order in H2 and first order in I2. Consider the proposed mechanisms.Proposed mechanism I: H2(g) + I2(g) → 2 HI(g) Single stepProposed mechanism II:I2(g) → 2 I(g)          FastH2(g) + 2 I(g) → {uildreloverlongrightarrow} atop {uildrel { k_3} over ;} 2 HI(g)          SlowShow that the first of the proposed mechanisms is valid.

🤓 Based on our data, we think this question is relevant for Professor Nash's class at PURDUE.

FREE Expert Solution

Rate Law represents an equation for a chemical reaction that connects the reaction rate with the concentrations or pressures of the reactants and the rate constant. 


Rate Law = k[A]x[B]y


Where k is the rate constant

          A and B are reactants

          x and y are reactant orders


The proposed mechanism 1 is:

H2(g) + I2(g) → 2 HI(g)           (single step)


View Complete Written Solution
Problem Details

Consider the gas-phase reaction: H2(g) + I2(g) → 2 HI(g)
The reaction was experimentally determined to be first order in H2 and first order in I2. Consider the proposed mechanisms.
Proposed mechanism I: H2(g) + I2(g) → 2 HI(g) Single step
Proposed mechanism II:
I2(g) → 2 I(g)          Fast
H2(g) + 2 I(g) → HI(g)          Slow

Show that the first of the proposed mechanisms is valid.

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Reaction Mechanism concept. If you need more Reaction Mechanism practice, you can also practice Reaction Mechanism practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Nash's class at PURDUE.