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İKİLİ SIVI SİSTEMLERİN DİFÜZYON SABİTLERİNİN BULUNMASI

DIFFUSION COEFFICIENTS OF THE BINARY LIQUID SYSTEMS

Journal Name:

  • Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi

Publication Year:

  • 1999

Key Words:

Keywords (Original Language):

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Abstract (2. Language): 
A procedure in which Stokes diffusion cell was used is given for the determination of the Stokes diffusion constant for the binary liquid systems. Experiments were repeated until reproducible results were obtained. The effect of stirring on diffusion was examined and the stirring rate of 60 rpm was used in subsequent experiments. The diaphragm of the cell was calibrated at 298 K by diffusing 0.1 N potassium chloride. The experimental cell constant(P) was found 0.1997 cm-2. The binary experiments were performed in a temperature controller water bath at 290 K. The experimental diffusion coefficients of the dimethylphtalate-acetic acid, diethylphtalate-acetic acid and benzyl alcohol-acetic acid were found 0.927x10-5 cm2/s, 0.623x10-5 cm2/s and 1.067x10-5 cm2/s, respectively. Furthermore, diffusion coefficients were calculated by the Scheibel and Wilke-Chang methods and compared with experimental values.
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Abstract (Original Language): 
İkili sıvı karışımlarının difüzyon katsayılarının (DAB) deneysel olarak hesaplanmasında Stokes difüzyon hücresi kullanıldı. Tekrarlanılabilir sonuçlar alınıncaya kadar deneyler tekrar edildi. Difüzyon üzerine karıştırma hızının etkisi incelendi. Deneylerde karıştırma hızı olarak 60 devir/dakika seçildi. Difüzyon hücresinin 298 K'de kalibrasyonu 0,1 N potasyum klorür çözeltisinin saf su içine difüzlenmesine göre hesaplandı ve hücre sabiti (P) 0,1997 cm-2 olarak bulundu. İkili karışımların difüzyon deneyleri 290 K'de termostatlı su banyosunda gerçekleştirildi. Dimetilftalat-asetik asit, dietilftalat-asetik asit ve benzil alkol-asetik asit sistemlerinin deneysel difüzyon katsayıları sırasıyla 0,927x10-5 cm2/s, 0,613x10-5cm2/s ve 1,054x10-5 cm2/s olarak bulundu. Bunlara ilave olarak Scheibel ve Wilke-Chang metotlarına göre hesaplanan difüzyon katsayıları deneysel değerler ile karşılaştırıldı.
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REFERENCES

References: 

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