298.15K에서의 Cyclohexane-alcohol계의 과잉 몰 부피

박소진; 오종혁

HWAHAK KONGHAK, Vol.32, No.5, 693-699, October, 1994

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298.15K에서의 Cyclohexane-alcohol계의 과잉 몰 부피

Excess Molar Volumes for the Systems Cyclohexane -Alcohol at 298.15K

박소진, 오종혁

초록

액상 혼합물의 용액거동은 혼합물 구성분자들 사이의 인력에 의존하며, 혼합시의 과잉 몰부피(V^E)는 따라서 각 구성 성분간의 상호관계를 이해하는데 뿐만 아니라 열역학적 설계에도 중요한 의미를 지니다. 본 실험에서는 25℃ 등온 하에서 cyclohexane-alcohol(C₁-C₄)혼합계의 과잉 몰부피를 digital vibrating tube densimeter를 이용하여 측정하였다. 본 실험에서 측정한 모든 cyclohexane-alcohol 혼합계의 과잉 몰부피값은 모두 이상용액으로부터 양의 편차를 보였으며, cyclohexane-methanol 혼합계에서는 불용영역을 나타내었다. 실험으로 얻은 데이터는 6개의 매개변수를 사용한 Redlich-Kister 다항식을 이용하여 합치시켜 보았으며, 실험값과의 평균편차(S_d)는 약 0.009㎤/mol 미만이었다.

Solution behavior of liquid mixtures are depend on the interactions of constituent molecules in solution, excess molar volume(V^E) is therefore very important in the thermodynamic design as well as understanding the relation between constituent components. In this work, excess molar volumes have been measured for binary mixtures of cyclohexane-alcohol(C₁-C₄)at 298.15K by using digital vibrating tube densimeter. Excess molar volume values show positive deviation from the ideality in all the measured cyclohexane-alcohol systems and expecially cyclohexane-methanol mixture has immiscible region. Experimental data were fitted with 6 parameter Redlich-Kister equation, and their standard deviations(Sd), from the experimental data were less than 0.009㎤/mol.

[References]

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[1] Papaioannou D, Ziakes D, Panayiotou C, J. Chem. Eng. Data, 36, 35 (1991)

[2] Anand SC, Grolier JE, Kiyohara O, Halpin CJ, Benson GC, J. Chem. Eng. Data, 20, 2 (1975)

[3] Qin A, Hoffman DE, Munk P, J. Chem. Eng. Data, 37, 1 (1992)

[4] Choudary NC, Naidu PR, J. Chem. Eng. Data, 30, 1 (1985)

[5] Ormonoudis C, Dakos C, Panayiotou C, J. Chem. Thermodyn., 36, 1 (1991)

[6] Snell FD, Ettre LS, "Encyclopedia of Industrial Chemical Analysis," John Wiley & sons, Inc. (1979)

[7] Weast RC, "CRC Handbook of Chemistry and Physics," CRC Press (1986)

[8] Redlich O, Kister AT, Ind. Eng. Chem., 40, 345 (1948)

[9] Spanedda A, Lepori L, Matteoli E, Fluid Phase Equilib., 69, 209 (1991)

[10] Arimoto A, Ogawa H, Murakami S, Thermochim. Acta, 163, 191 (1990)

[11] Pettenati C, Alessi P, Fermeglia M, Kikic I, Thermochim. Acta, 162, 203 (1990)

[12] Riddick JA, Bunger EB, "Organic Solvents. Physical Properties and Methods of Purification," Wiley-Interscience, New York (1986)

[13] Dean JA, "Handbook of Organic Chemistry," Donelly & Sons Co. (1987)