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diff --git a/905/CH8/EX8.5/8_5.sce b/905/CH8/EX8.5/8_5.sce
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+clear;
+clc;
+
+// Illustration 8.5
+// Page: 487
+
+printf('Illustration 8.5 -  Page: 487\n\n');
+
+// Solution
+//*****Data*****//
+T_w = 320; // [K]
+T_g = 340; // [K]
+lambda_w = 2413; // [Latent Heat of Vaporization at 320K, kJ/kg]
+Y_w1 = 0.073; // [kg water/kg dry air]
+//*****//
+A = 0.95; // [For air water system,A, kJ/kg.K]
+
+//    here A = hg/ky, psychrometric ratio
+//    Air-water mixture is saturated at 320K and 1 atm
+//    Using equation 8.15
+ 
+Y_w2 = Y_w1 - ((T_g-T_w)*A/lambda_w); // [kg water/kg dry air]
+printf("Absolute humidity of air-water mixture at 340 K and 1 atm is %f kg water/kg dry air\n ",Y_w2);
+\ No newline at end of file