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+clear ;
+clc;
+// Example 5.8
+printf('Example 5.8\n\n');
+printf('Page No. 122\n\n');
+
+// given
+T1 = 25;// in degree celcius
+T2 = 450;// in degree celcius
+m = 7.5;// Mass flow rate in kg/s
+
+//from steam table
+hL_450 = 3303*10^3;// Specific enthalpy at 450 degree celcius in J/kg
+hL_25 = 105*10^3;// Specific enthalpy at 25 degree celcius in J/kg
+
+Q = m*(hL_450 - hL_25);// in W
+printf('The required heat is %.0f W',Q)// Deviation in answer due to direct substitution and some approximation in answer in book