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+//Chapter-5,Example 7,Page 124
+clc();
+close();
+
+//for 2st order reaction 
+//k = (1/a*t)*(x/(a-x))
+
+a= 16    
+
+//time intervals
+
+t=[ 5 15 25 35]
+
+//assume y = a-x
+
+y=[ 10.24 6.13 4.32 3.41]    //volume of acid
+
+x=a-y
+
+k = (1 ./(a*t)).*(x./(y))
+
+printf('value of k are ' )
+
+disp(k)
+
+printf('since k values are fairly constant by putting in 2nd order rate equation. \nHence dhydrolysis of methyl acetate is of 2st order.')
+