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diff --git a/647/CH3/EX3.11/Example3_11.sce b/647/CH3/EX3.11/Example3_11.sce
new file mode 100755
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+++ b/647/CH3/EX3.11/Example3_11.sce
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+clear;
+clc;
+
+// Example: 3.11
+// Page: 107
+
+printf("Example: 3.11 - Page: 107\n\n");
+
+// Solution
+
+//*****Data*****//
+Tc = 513.9;// [K]
+Pc = 61.48*10^5;// [Pa]
+//************//
+
+Tr = 0.7;
+T = Tr*Tc - 273.15;// [OC]
+P_sat = 10^(8.112 - (1592.864/(T + 226.184)));// [mm Hg]
+P_sat = P_sat*101325/760;// [Pa]
+Pr_sat = P_sat/Pc;// [Pa]
+omega = -1 - log10(Pr_sat);// [Acentric factor]
+printf("Acentric factor is %.4f",omega);
+\ No newline at end of file