The structure for the transition state for the given reaction and the data needed to determine the value of k using transition-state theory is to be stated. Concept introduction: The Eyring equation gives the variation of rate of reaction with temperature. This equation is for transition state theory and resembles the Arrhenius equation. The Eyring equation is a more accurate method for the calculation of rate constant and also it gives idea of the progression of the reaction at molecular level.

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Chapter 20, Problem 20.97E

Interpretation Introduction

Interpretation:

The structure for the transition state for the given reaction and the data needed to determine the value of k using transition-state theory is to be stated.

Concept introduction:

The Eyring equation gives the variation of rate of reaction with temperature. This equation is for transition state theory and resembles the Arrhenius equation. The Eyring equation is a more accurate method for the calculation of rate constant and also it gives idea of the progression of the reaction at molecular level.

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The equilibrium NH3(aq) + H2O(l) ↔NH4+(aq) + OH−(aq) at 25 °C is subjected to a temperature jump which slightly increases the concentration of NH4+(aq) and OH−(aq). The measured relaxation time is 7.61 ns. The equilibrium constant for the system is 1.78 × 10−5 at 25 °C, and the equilibrium concentration of NH3(aq) is 0.15 mol dm−3. (a) Calculate the rate constant for the forward step. kf,eff = _____________. (b) choose a unit for the forward rate constant. (c) Calculate the rate constant for the reverse reaction. krev = _____________.