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+//Chemical Engineering Thermodynamics

+//Chapter 13

+//Thermodynamics in Phase Equilibria

+

+//Example 13.18

+clear;

+clc;

+

+//Given

+T1 = 273-87;//temp in K

+T2 = 273;//temp in K

+H1 = 115;//Latent heat of saturated ethane at 1 atm and -87 deg cel in Kcal/Kg

+H2_ex = 72.44;//Experimental value of latent heat at 0 deg cel in Kcal/Kg

+Tc = 306;//Critical temperature in K

+M = 30;//Molecular weight of ethane

+

+//To Calculate the latent heat of saturated ethane at 0 deg cel

+Tr1 = T1/Tc;//reduced temp in K

+Tr2 = T2/Tc;//reduced temp in K

+//(i)Using Waton's method:

+H2_c = H1*((1-Tr2)/(1-Tr1))^0.38;

+mprintf('(i)The latent heat of saturated ethane at 0 deg cel using Waton method is %f Kcal/Kg',H2_c);

+D = (H2_ex-H2_c)*100/H2_ex;

+mprintf('\n   The deviation occurs using this method is %f percent',D);

+

+//(ii)Using Vishwanath and Kuloor method

+//From equation 13.117 (page no 289)

+n = (0.00133*(H1*M/T1)+0.8794)^(1/0.1);

+H2_c = H1*((1-Tr2)/(1-Tr1))^n;

+mprintf('\n\n(ii)The latent heat of saturated ethane at 0 deg cel using Vishwanath and Kuloor method is %f Kcal/Kg',H2_c);

+D = (H2_ex-H2_c)*100/H2_ex;

+mprintf('\n   The deviation occurs using this method is %f percent',D);

+//end
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