Question

what ia half life period? write expression for half life period of a girst order reaction.

Answer 1

Half-life period of a first order reaction. Since k is a constant for a given reaction at a given temperature and the expression lacks any concentration term so from equation 3 it is evident that half-time of a 1st order reaction is a constant independent of initial concentration of reactant.

Answer 2

Half - Life Period Reaction :---

⇒ DEFINATION ;

The time in which the concentration of a reactant is reduced to one half of its initial concentration .

⇒  Half - Life for 1st order reaction

•  indipendent of initial concentration .
• 0.693/k