In the thermodynamics, we have studied whether a reaction will take place or not and if it does then upto what
extent. In this chapter (chemical kinetics) we will study about how fast a chemical reaction takes place and
what are the different factors affecting this rate of chemical reaction. How to optimise the conditions as to
maximise the output in optimum time. The last part of chapter will be dealing with the mechanism of a chemical
reaction and catalysis.
Factors affecting rate of chemical reaction
Rate Law (Dependence of rate on concentration of reactants)
Integrated rate laws Zero order reactions For a zero order reaction
Generation time
Methods to determine order of a reaction
Methods to monitor the progress of the reaction
Effect of temperature on rate of reaction
It was developed by Max Trautz and William lewis.
It gives insight in to the energetics and mechanistic aspects of reactions.
It is based upon kinetic theory of gases
It was developed by Max Trautz and William lewis.
It gives insight in to the energetics and mechanistic aspects of reactions.
It is based upon kinetic theory of gases.
A catalyst is a substance, which increases the rate of a reaction without itself being consumed at
the end of the reaction, and the phenomenon is called catalysis
A catalyst does not initiate the reaction. It simply fastens it.
l Only a small amount of catalyst can catalyse the reaction
The number of molecules that react in an elementary step is the molecularity of the elementary reaction. Molecularity
is defined only for the elementary reactions and not for complex reactions. No elementary reactions involving
more than three molecules are known, because of very low probability of near-simultaneous collision of more
than three molecules
Mechanism of a reaction Reactions can be divided into
CALCULATION OF RATE LAW/ ORDER MECHANISM IN WHICH R.D.S. GIVEN
SEQUENTIAL 1ST ORDER REACTION OR CONSECUTIVE FIRSTORDER
REACTIONS
SEQUENTIAL 1ST ORDER REACTION OR CONSECUTIVE FIRSTORDER
REACTIONS
All radioactive disintegration follow Ist order kinetics
Carbon dating used for wooden object
