Termo Vle PDF
Termo Vle PDF
Termo Vle PDF
Vapor-Liquid Equilibria
Kelompok 2:
Alif A. Gibran
Brilly Cahyo K
Fadhilah Ansyari
Karina Ayuningtyas
Vida Zinia
Part 1
Gambar berikut menunjukkan plot T terhadap komposisi dari campuran biner N2
dan O2 fugasitas pada tekanan 1 bar.
● Dew Point Calculation merupakan suatu metode perhitungan yang biasa digunakan
pada campuran multi-komponen. Metode perhitungan ini dilakukan dengan metode
trial and error untuk mencari nilai Tdew, dan untuk mencari nilai komposisi liquid pada
saat tercapai titik embun (xi) apabila diketahui komposisi dari uap superjenuh
(superheated vapor) dan tekanan, serta mencari nilai Pdew dan xi apabila diketahui
komposisi dari uap superjenuh dan temperatur.
Part 1
f. Gambar ulang plot T-xy tersebut diatas dengan menggunakan hukum
Raoult.
(1) Mencari nilai parameter Antoine (A, B, dan C)
A B C
Menggunakan persaman:
Part 1
f. Gambar ulang plot T-xy tersebut diatas dengan menggunakan hukum
Raoult.
O2 dan N2 mendekati campuran ideal. Hal tersebut disebabkan karena keduanya memiliki
besar molekul yang hampir sama dan memiliki daya tarik van der waals yang sama di
antara mereka.
x1 x2 y1 y2 P
0 1 0 1 -1 2 0 1 15,91
Titik Kritis
4. Plot the
following data to
gain the Bubble
and Dew Lines of
methanol (1) and
ethyl acetate (2)
as shown below:
• Activity coefficient is the ratio of chemical activity of a substance to its
molar concentration
• In solutions, activity coefficient is a measure of how much a solution
differs from an ideal solution, that is one in which the chemical
effectiveness of molecules within the solution equals to the theoretical
effectiveness
• Deviations can occur in a
• (-) Negative (where activity coefficient is less than 1) means that the
interactions between molecules alike are stronger than the interactions
between different molecules in a solution
• (+) Positive deviations means that the interactions between molecules
alike are stronger than that of the unlike molecules
●
Plotting BublP using Margules Equation
●
A12 = 1.212466955
A21= 1.102436037
Plotting using the Margules equation
x1 x2 𝛄₁ 𝛄₂
● 0
0.05
1
0.95
3.011493
2.960027
1
1.003284
0.1 0.9 2.871898 1.01309
0.15 0.85 2.754566 1.029438
0.2 0.8 2.615771 1.05247
0.25 0.75 2.462976 1.08244
0.3 0.7 2.302956 1.119725
0.35 0.65 2.141549 1.164825
0.4 0.6 1.983528 1.218372
0.45 0.55 1.832602 1.281143
0.5 0.5 1.691489 1.354073
0.55 0.45 1.562041 1.438273
0.6 0.4 1.445405 1.535054
0.65 0.35 1.342184 1.645955
0.7 0.3 1.252597 1.772769
0.75 0.25 1.176627 1.917585
0.8 0.2 1.114156 2.082829
0.85 0.15 1.065085 2.271316
0.9 0.1 1.02945 2.486306
0.95 0.05 1.007534 2.731576
1 0 1 3.011493
Plotting using the Margules equation
T (°C) P1 (mmHg) P2(mmHg) P1sat . 𝛄₁ . x1 P2sat . 𝛄₂ . x2 P total
● 77.0436014 1215.266547 759.9998999 0 759.9998999 759.9998999
71.96226263 1007.456079 640.9424578 149.1048797 610.895019 759.9998987
68.05656249 868.552648 559.9596647 249.439475 510.5605067 759.9999817
65.05765495 773.0439099 503.5180662 319.4101149 440.589744 759.9998589
62.77661906 706.4005876 463.7227975 369.556498 390.4433247 759.9998227
61.07374327 659.8339864 435.6960709 406.288776 353.7111054 759.9998814
59.841709 627.765186 416.2823244 433.7147426 326.2852144 759.999957
58.9956665 606.5063247 403.3594063 454.6019759 305.3980213 759.9999972
58.46710628 593.5330185 395.4515388 470.9156955 289.0842958 759.9999913
58.19998217 587.065361 391.5029316 484.1357614 275.8641922 759.9999537
58.14824346 585.8194944 390.7418271 495.4535179 264.5463868 759.9999047
58.27428247 588.8583863 392.5980228 505.9015175 254.0983427 759.9998602
58.54798816 595.5030577 396.6534474 516.4459651 243.5538619 759.999827
58.94619997 605.2822201 402.6139625 528.0602184 231.9395874 759.9998059
59.4524148 617.9071779 410.2951973 541.7922081 218.2075858 759.9997939
60.05663314 633.2637294 419.617792 558.8366149 201.1631728 759.9997877
60.75524193 651.4154386 430.6088091 580.6228946 179.3768875 759.9997821
61.55081934 672.6137445 443.4066145 608.932312 151.0674564 759.9997684
62.45169373 697.3097388 458.2660689 646.0607537 113.9389818 759.9997355
63.47096599 726.1588382 475.5587 695.0484616 64.95124191 759.9997035
64.62444978 759.9998578 495.7568461 759.9998578 0 759.9998578
Plotting using the Margules equation
Azeotrope, at 58.5oC,
composition: 6:4
g. Comments on the shape of ● System is non-ideal, existence of azeotrope
the phase envelope shown ● Temperature boils at a fixed ratio (of components) at a
above and based your
point that might be lower or higher than the boiling
explanation on the molecular
structure and molecular points of each components in its pure state
interaction between the ● Positive azeotrope, with boiling point lower than each of
molecules the pure states
○ @ T= 58.5 degrees C