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diff --git a/632/CH11/EX11.31/example11_31.sce b/632/CH11/EX11.31/example11_31.sce
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+//clc()
+Vgas = 0.09;//m^3
+Vliq = 0.01;//m^3
+SVliq = 1.061*10^-3;//m^3/kg
+SVvap = 0.8857;//m^3/kg
+mvap = Vgas / SVvap;
+mliq = Vliq / SVliq;
+Ul = 504.5;//kJ/kg
+Ug = 2529.5;//kJ/kg
+U1 = Ul * mliq + Ug * mvap;
+SVtotal = (Vgas + Vliq)/(mvap + mliq);
+//using steam table , these value of specific volume corresponds to pressure of 148.6bar and internal energy of 2464.6kJ/kg
+U = 2464;//kJ/kg
+Utotal = U * (mvap + mliq);
+//Utotal - U1 = Q - W,but W = o, hence, 
+Q = Utotal - U1;
+disp("kJ",Q,"Heat to be added = ")
+\ No newline at end of file