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+clear;

+clc;

+

+//To find Approx Value

+function[A]=approx(V,n)

+  A=round(V*10^n)/10^n;//V-Value  n-To what place

+  funcprot(0)

+endfunction  

+

+//Example 3.9

+//Caption : Program to Find Molar Volume of n-Butane by Various Eqn

+//Given Values

+T=510;//Temp=510K

+P=25;//Pressure=25bar

+R=0.08314;

+

+//(a)

+//By the Ideal-gas Equation

+

+V=approx(R*T/P,4);//m^3/kmol

+disp('(a)By the Ideal-gas Equation')

+disp('m^3/kmol',V,'The Molar Volume is ')

+

+//(b)

+//The Generalized compressibility-factor Correlation

+Tc=425.1;//From App.B

+Pc=37.96;//From App.B

+Tr=approx(T/Tc,1);

+Pr=approx(P/Pc,3)

+//Interpolation in Tables E.1 and E.2 then provides

+Z0=0.865;

+Z1=0.038;

+w=0.200;

+Z=Z0+(w*Z1);

+V=approx(Z*R*T/P,2);//m^3/kmol

+disp('(b)The Generalized compressibility-factor Correlation')

+disp('m^3/kmol',V,'The Molar Volume is ')

+

+//(c)

+//The Generalized Virial-coefficient Correlation

+B0=0.083-(0.422/(Tr^1.6));//Eqn (3.61)

+B1=0.139-(0.172/(Tr^4.2));//Eqn (3.62)

+K=approx(B0+(w*B1),3)//K=BPc/RTc By Eqn (3.59)

+//By Eqn(3.58)

+Z=approx(1+(K*Pr/Tr),3)

+V=approx(Z*R*T/P,4);//m^3/kmol

+disp('(c)The Generalized Virial-coefficient Correlation')

+disp('m^3/kmol',V,'The Molar Volume is ')

+

+//End
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