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diff --git a/1019/CH4/EX4.11/Example_4_11.sce b/1019/CH4/EX4.11/Example_4_11.sce
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+//Example 4.11
+clear;
+clc;
+
+//Given
+R=8.314;// gas constant in J K^-1 mol^-1
+T=300; //initial temperature in K
+r=3;//ratio of final volume to initial volume
+
+//To calculate the entropy
+q=R*T*log(r);//r=V2/V1
+n=(P*V1*0.001)/(R*T);//moles
+delSsys=q/T;//entropy of system in J K^-1 mol^-1
+delSuniv=R*log(r);//entropy of universe in J K^-1
+mprintf('(a) Entropy of the system = %f J K^-1 mol^-1',delSsys);
+mprintf('\n Entropy of the surrounding = 0 J K^-1 mol^-1');
+mprintf('\n \n (b) Entropy of the system = 0 J K^-1 mol^-1');
+mprintf('\n Entropy of the surrounding = %f J K^-1 mol^-1',delSuniv);
+//end
+\ No newline at end of file