part b part c One common problem for many students is not looking at data carefu

Question

part b

part c

One common problem for many students is not looking at data carefully before trying to force it into an equation. This is very common with kinetics data since there are two important equations containing natural log terms. You must be certain which data are being presented and then to chose the appropriate mathematical treatment. Consider the information from previous kinetics activities as well as this one 4.50000 9.000 8.000 7.000 6.000 5.000 4.000 3.000 2.000 1.000 0.000 4.70000 4.90000 -5.10000 5.30000 -5.50000 -5.70000 -5.90000 -6.10000 200 400 600 800 1000 1200 0.00095 0.00105 0.00115 0.00125 0.00135 0.00145 0.00155 Time, min 1/T

Explanation / Answer

PART A:

1. Option is (E)

ln [A]t = - k t + ln [A]0;

slope = - k (rate constant)

2. Option is (C).

lnk = (-Ea/RT) + ln A ;

Slope = Ea/R

PART B:

1. Option is (E)

ln [A]t = - k t + ln [A]0;

2. Option is (F)

lnk = (-Ea/RT) + ln A

PART C:

PLOT A is for option (D)

ln [A]t = - kt + ln [A]0 ;

ln[A] vs time, is the kinetic plot for First order reaction.

PLOT B is for option (B)

lnk = (-Ea/RT) + ln A ;

since its a plot of lnk vs 1/T;

Activation energy equation

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