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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 21, Number 2
JKCSEZ 21(2)
April 20, 1977

Title	Isotope Effects on Vapor Pressure 증기압에 미치는 동위원소 효과
Author	Youngie Oh, Mu Shik Jhon 오영기, 전무식
Keywords
Abstract	순수한 액체의 증가압에 미치는 동위원소 효과를 연구하였고, 증기압 비를 계산하였다. Significant Structure Theory of Liquid를 사용한 계산결과에 의하면, C2H4/C2H2D2(trans)계 에서는 분자량과 관성능률에 의한 효과가 현저하고, C2H2D2(trans)/C2H2D2(cis)계에서는 분자 회전이 자유롭지 못한 데서 오는 영점에너지 효과가 현저했다. 그리고, CH3OH/CH3OD계에서는 분자간 인력이 동위원소에 따라 다르기 때문임이 밝혀졌다. CH4/CD4, SiH4/SiD4, GeH4/GeD4 동위원소계에서는 분자량에 의한 효과가 CH4/CD4 > SiH4/SiD4 > GeH4/GeD4의 순서로 감소함을 알 수 있었다. The isotope effect of pure liquid on vapor pressure is examined, and the vapor pressure ratios of two different isotopes are calculated. Based on the Significant Structure Theory of Liquids, the effect of molecular weight and the effect of moments of inertia are dominant in ordinary/trans-d2 ethylene isotopes; the effect of hindered rotational zero-point energy is dominant in trans-d2/cis-d2 ethylene isotopes; and the effect of intermolecular potential difference is found in CH3OH/CH3OD isotopes. In the isotopes of CH4/CD4, SiH4/SiD4 and GeH4/GeD4, the weight effect decrease in the order of CH4/CD4 > SiH4/SiD4 > GeH4/GeD4.
Page	75 - 82
Full Text	PDF

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