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half life

Posted: Sun Mar 08, 2020 5:40 pm
by Clarice Chui 2C
How does half life of a reaction relate to kinetics?

Re: half life

Posted: Sun Mar 08, 2020 5:47 pm
by Jason Wu 1E
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
by Sydney Myers 4I
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
by Ashley Wang 4G
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
by Brandon Valafar
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
by Niharika 1H
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
by kristi le 2F
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.