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### half life

Posted: Sun Mar 08, 2020 5:40 pm
How does half life of a reaction relate to kinetics?

### Re: half life

Posted: Sun Mar 08, 2020 5:47 pm
The half-life of a reaction is the amount of time it takes for the initial concentration of half. It is related to kinetics with the equation t(1/2)=ln(2)/k where k is the reaction rate constant within a first order reaction.

### Re: half life

Posted: Sun Mar 08, 2020 6:58 pm
The equation for the half life of a reaction can be derived from its integrated rate law. The rate of the reaction has a direct effect on the half life of the reaction.

### Re: half life

Posted: Sun Mar 08, 2020 9:56 pm
Half life is inversely proportional to reaction rate. The larger the rate constant k, the shorter the half life.

### Re: half life

Posted: Sun Mar 08, 2020 10:06 pm
The larger K is, the shorter the half life is. They are inversely related.

### Re: half life

Posted: Sun Mar 08, 2020 10:13 pm
First order reaction: t0.5 = 0.693/k
Second order reaction: t0.5 = 1/(k * A0)

### Re: half life

Posted: Sun Mar 08, 2020 10:29 pm
Half life is the time needed for concentration to fall to half its initial value. Half life is independent of initial concentration but is inversely related to the rate constant.