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Grade 11Physical Chemistry

Does the half life of a first order reaction continuously changes with time?

Profile image of Azain Ahmed
13 Years agoGrade 11
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3 Answers

Profile image of amit  sharma
ApprovedApproved Tutor Answer13 Years ago

dear azain ahmed,

see the half life of  reaction depends upon the concentration...

but the first order kinetics is independent of the  initial concentration as the change in concentration over a specified time is same specifically for 1 order reaction

........

please approve..... if satisfying..

Profile image of Rama Subramanian
ApprovedApproved Tutor Answer13 Years ago

Half life of first order reaction is independent of concentration.

Half life is the time taken for 50% of the sample to decay.

You ask if it will chage with time. If you mean to ask that if half life will remain same both today and after hundred years.Then the answer to that question is yes

Profile image of Mujahid Ahmed
13 Years ago

For first order kineics, Half life is given by, T = 0.693/k 

As you can see, it''s independent of all factors except "k".