Question

use matlab

The following table contains information from a chemistry experiment in which the concentration of a product was measured at one minute intervals. Plot this data. Suppose it is known that this chemical reaction should follow the law: C- a- be-0.2 Change the variables such that the law becomes a linear function. Then use built-in polyfit function in MATLAB to find the coefficients of the linear function. Find a and b and then plot the graph of a -be-0.2t on the interval (0,8 (as a solid curve), along with the original data points (using . What will be the eventual concentration? 8 C | 3.033 | 3.306 | 3.672 3.929 | 4.123 | 4.282 | 4.399 | 4.527 | 4.622 Answer: a 5.025 and b- 2.0266 -0:8 C '3.033 3.306 3.672 3.929 4.123 4.282 4.399 4.527 4.622].

Answer 1

Code:

clear
clc
% C = a - be^-0.2t
% Comparing with linear eq. Y = MX + C
%Y = C , M = b , X = e^-0.2t

t = 0:8;
C = [3.033 3.306 3.672 3.929 4.123 4.282 4.399 4.527 4.622];

Y = C;
X = exp(-0.2.*t);
p = polyfit(X, Y, 1);
b = -p(1)
a = p(2)
%Ce is C calculated from equation
Ce = a - b.*exp(-0.2.*t);
plot(t, C, 'r*',t, Ce, 'b-');

Output:

4.8 4.6 4.4 4.2 3.8 3.6 3.4 3.2

Command Window b= 2.0266 5.025 fx >>