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Half life of first order:
Time required to consume the half of initial concentration of reactant is called half life period.
At half life time:
Thus half life period is independent of initial concentration.
Unit of rate constant is time-1.
Reciprocal of rate const. (half life) is average life.
After ‘n’ half times the concentration A= A0/2n
Examples:
T75 = 2 ´ t50. i.e. time taken to complete 75 % of reaction is twice that of half life time.
Examples of First Order Reactions:
Half life of Nth Order Reaction:
For nth order reaction the mathematical expression:
Chemical Kinetics of population growth:
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Class 12 Chemistry Chemical Kinetics All Topics Notes CBSE Class 12 Chemistry All Chapters Notes
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