A→ B
has a rate constant of 2.5 s-1.
i)What is the rate at time=0 if the initial concentration of A ii) Calculate the concentration of A remaining after 1 s from an initial concentration of 0.7 mol dm-3.
iii)Calculate the activation energy for the reaction if the Arrhenius pre-exponential factor is 1x 1011 s-1 at 35 oC
2007-01-19 22:52:10 · 2 answers · asked by amanda p 1 in Science & Mathematics ➔ Chemistry
for the first part
dA/dt = -kA
therefore the expression for A is
A(t) = A0 exp(-k*t)
where A0 is the initial concentration and t is the time.
for the second part
k= preexponential * exp(-activation energy/ Kb *T)
where Kb is the boltzmann constant and T is temperature in kelvin.
just plug numbers into those equations (rearranging the second one) and you will get the answers.
2007-01-19 23:09:45 · answer #1 · answered by Mike 5 · 0⤊ 0⤋
You really should learn how to do your own Homework ..
What if the answers you get here are wrong ?
How you going check if you don't understand ??
2007-01-20 09:20:19 · answer #2 · answered by Steve B 7 · 0⤊ 0⤋