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diff --git a/2465/CH5/EX5.1/Example_1.sce b/2465/CH5/EX5.1/Example_1.sce
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+//Chapter-5,Example 1,Page 121
+clc();
+close();
+
+//for 1st order reaction 
+//k = (1/t)*log(a/(a-x))
+
+a= 46.1     //time value 
+
+//time intervals
+
+t=[ 5 10 20 30 50]
+
+x=[ 37.1 29.8 19.6 12.3 5.0]
+
+k = (1 ./t).*log(a./(x))
+
+printf('value of k are ' )
+
+disp(k)
+
+printf('since k values are fairly constant by putting in 1nd order rate equation. \nHence decomposition of H2O2 is of 1st order.')
+