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Examples-MathCAD

# Examples-MathCAD - Using Mathcad to create T-x-y and x-y...

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The solution of the system of equations is written as a function of y1 . This is useful if you want to solve the system for several values of y1 . Solution y1 ( ) Find x1 T , ( ) := 1 x1 - ( ) γ 2 x1 T , ( ) Psat2 T ( ) 1 y1 - ( ) P = x1 γ 1 x1 T , ( ) Psat1 T ( ) y1 P = Given Mathcad solution block T 300 := x1 0.5 := Initial approximations for the unknowns Psat2 T ( ) exp 14.25326 2665.54 T 53.424 - - := Psat1 T ( ) exp 16.59158 3643.310 T 33.424 - - := Antoine equations, T in K γ 2 x1 T , ( ) exp A T ( ) x1 2 ( ) := γ 1 x1 T , ( ) exp A T ( ) 1 x1 - ( ) 2 := The activity coefficients depend on temperature and composition, T in K A T ( ) 2.771 0.00523 T - := Temperature dependence of the activity coefficient parameter, T in K P 101.33 := Pressure, kPa Input data and expressions Using Mathcad to create T-x-y and x-y diagrams Methanol(1)/Methyl acetate(2)

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x1 y1 ( ) Solution y1 ( ) 0 := Since we have 2 unknows in the system of equations, the solution
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Examples-MathCAD - Using Mathcad to create T-x-y and x-y...

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