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+//Chapter-5,Example 2,Page 122
+clc();
+close();
+
+t=[7.18 18 27.05] //time in minute
+
+r=[ 21.4 17.7 15] //rotation in degrees
+
+r_0=24.09
+
+r_a=-10.74
+
+k=(1 ./t).*log10((r_0-r_a)./(r-r_a))
+
+printf('values of k')
+
+disp(k)
+
+printf('since k values are fairly constant by putting in 1nd order rate equation. \nHence hydrolysis of methyl acetate is of 1st order.')