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+//Hougen O.A., Watson K.M., Ragatz R.A., 2004. Chemical process principles Part-1: Material and Energy Balances(II Edition). CBS Publishers & Distributors, New Delhi, pp 504
+
+//Chapter-8, Illustration 6, Page 282
+//Title: Calculation of total enthalpy
+//=============================================================================
+clear
+clc
+
+//INPUT
+AW = 65.4; //Atomic weight of zinc
+T = [1000 0 419 907]; //Given temperature, solid state temperature, melting point and boiling point of zinc in degree C
+CP = [0.105 0.109]; //Mean specific heat of solid from 0-419 degree C and liquid from 419-907 degree C in cal per gram degree C obtained from Fig 63, Page 260
+lamda1 = 1660; //Heat of fusion in cal per g-atom obtained from Table 24, Page 272
+CP1 = 4.97; //Molal heat capacity of zinc vapor at constant preesure in cal per g-mole
+
+//CALCULATION
+T1 = T+273; //Given temperature, solid state temperature, melting point and boiling point of zinc in K
+lamda2 = T1(4)*(8.75+4.571*log10(T1(4))); //Heat of vaporization at normal boiling point in cal per g-mole
+Lamda1 = CP(1)*(T(3)-T(2)); //Heat absorbed by solid in cal per gram
+Lamda2 = lamda1/AW; //Heat of fusion in cal per gram
+Lamda3 = CP(2)*(T(4)-T(3)); //Heat absorbed by liquid in cal per gram
+Lamda4 = lamda2/AW; //Heat of vaporization in cal per gram
+Lamda5 = CP1*(T(1)-T(4))/AW; //Heat absorbed by vapor in cal per gram
+Lamda = Lamda1+Lamda2+Lamda3+Lamda4+Lamda5; //Total enthalpy in cal per gram
+
+//OUTPUT
+// Console Output
+mprintf('\n Total enthalpy of zinc vapor at 1000 degree C = %3.0f cal per gram',Lamda);
+
+// File Output
+fd= mopen('.\Chapter8_Example6_Output.txt','w');
+mfprintf(fd,'\n Total enthalpy of zinc vapor at 1000 degree C = %3.0f cal per gram',Lamda);
+mclose(fd);
+
+//=============================END OF PROGRMAM=================================