Explore BrainMass

Molecularity, Rate Expressions and Rate Determining Step

This content was STOLEN from BrainMass.com - View the original, and get the already-completed solution here!

The hydrogenation of ethylene (C2H4) to ethane (C2H6)is accomplished by the following mechanism:

(1) H2 <--> 2H
(2) C2H4 + H --> C2H5
(3) C2H5 + H --> C2H6
Net: H2 + C2H4 --> C2H6

Classify the reaction molecularity in each elementary step. If the overall rate expression for the net reaction is rate = k[H2], which elementary step is the rate determining step?

© BrainMass Inc. brainmass.com October 24, 2018, 10:57 pm ad1c9bdddf

Solution Preview

(A) Molecularity of a reaction step is the total number of reacting molecules in that step. Therefore, the molecularities ...

Solution Summary

All the questions have been answered.

Molecularity of a reaction step is the total number of... The rate expressions for the three steps of the... the rate determining step.

See Also This Related BrainMass Solution

Physical Chemistry Collision Theory

I have a list of terms that needs to be defined in a Physical Chemistry course. With each definition I need an example for each term, as a description to it or so

term Chapter
collision theory
transition state theory
rate constant
Arrhenius equation
integrated rate law
rate law
activation energy
pseudo first order
preexponential factor (a)
half life
zeroth order reaction
first order reaction
second order reaction
third order reaction
method of initial rates
isolation method
reaction profile
collision frequency
reaction coordinate
flash photolysis
stopped flow experiment
temperature jump experiment
elementary reactions
consecutive reactions
unimolecular reactions
steady state approximation
rate-determining step
diffusion-controlled limit
Homogeneous catalyst
heterogeneous catalyst
Michealis- Menten kinetics
KM Michealis constant
Maximum Turnover number
Maximum Velocity
Line-Weaver-Burke Plot
Woolf Plot
Eadee-Hofstee Plot
Competitive inhibitor
Non-Competitive Inhibitor
Uncompetitive Inhibitor
Chain Reaction
Inhibition Step
Termination Step
Retardation Step
Branching Step

View Full Posting Details