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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-3, Illustration 7, Page 59
+//Title: Calculation of density
+//=============================================================================
+clear
+clc
+
+//INPUT
+W = 1; //Total weight of mixture in lb
+w = [.111,.889]; //Weight of hydrogen and oxygen respectively in lb
+MW = [2,32]; //Molecular weight of hydrogen and oxygen respectively in lb/lb mole
+T = 30; //Given temperature in degree C
+T2 = 273; //Temperature at standard conditions in K
+P1 = 29; //Given prssure in in. Hg
+P2 = 29.92; //Pressure at standard conditions in in. Hg
+
+//CALCULATIONS
+n1 = w(1)/MW(1); //No of moles of H2 in lb mole
+n2 = w(2)/MW(2); //No of moles of O2 in lb mole
+N = n1+n2; //Total molal quantity in lb mole
+T1 = T+273; //given temperature in K
+V2 = N*359; //Volume at standard condition in cu ft
+V1= V2*(P2/P1)*(T1/T2); //Volume of the mixture at given conditions in cu ft
+rho = W/V1; //Density of the mixture at given conditions in lb per cu ft
+
+//OUTPUT
+mprintf('\n The density of the mixture at %2.0f in. Hg and %2.0f degree C is %5.4f lb per cu ft',P1,T,rho);
+
+//====================END OF PROGRAM===========================================