Item type |
デフォルトアイテムタイプ(フル)(1) |
公開日 |
2010-01-26 |
タイトル |
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タイトル |
Spectrophotometric and Calorimetric Studies of the Thermodynamics for the Interaction of Sodium p-Toluenesulfonate with Dodecyltrimethylammonium Bromide Micelles |
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言語 |
en |
作成者 |
Uchihara, Toshio
Nakasone, Kazuya
Arakaki, Akira
Kinjo, Akio
宇地原, 敏夫
仲宗根, 一哉
新垣, 明
金城, 昭夫
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アクセス権 |
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アクセス権 |
open access |
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アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
内容記述 |
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内容記述タイプ |
Other |
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内容記述 |
The thermodynamic properties for the interaction of sodium p-toluenesulfonate with dodecyltrimethylammonium bromide micelles were studied by spectrophotometric and calorimetric techniques to compare these two methods with each other as a means for the study of such an interaction. Thermodynamic parameters of K = (2.5 ±0.7) x 10^3 M^<-1>, ΔG°= -4.6±0.4 kcal mol^<-1>, ΔH°= -2.1±0.2 kcal mol^<-1> and ΔS°= 8.4 ±0.7 cal deg^<-1> mol^<-1> were obtained by the spectrophotometric method at 25℃. Calorimetric method gave K=(2.0 ± 1.5) x 10^3 M^<-1>, ΔG°= -4.5±1.O kcal mol^<-1>, ΔH°= -1.40±0.09 kcal mol^<-1> and ΔS°= 10±3 kcal mol^<-1> at the same temperature. The results suggest that the spectrophotometric method is recommended for the determination of equilibrium constant and standard free energy change and calorimetric method for the measurement of standard enthalpy change. Entropy change had better be evaluated by the combination of two methods. Though the calorimetric method produced larger errors in the present study because of the small heat of the interaction, it would be useful for the study of the interactions of the systems which evolve the appreciable heat and to which the spectrophotometric method is not applicable. |
内容記述 |
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内容記述タイプ |
Other |
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内容記述 |
紀要論文 |
出版者 |
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言語 |
ja |
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出版者 |
琉球大学理学部 |
言語 |
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言語 |
eng |
資源タイプ |
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資源タイプ |
departmental bulletin paper |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
出版タイプ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
識別子 |
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識別子 |
http://hdl.handle.net/20.500.12000/15190 |
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識別子タイプ |
HDL |
収録物識別子 |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
0286-9640 |
収録物識別子 |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AN00250774 |
収録物名 |
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言語 |
ja |
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収録物名 |
琉球大学理学部紀要 |
収録物名 |
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言語 |
en |
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収録物名 |
Bulletin of the College of Science. University of the Ryukyus |
書誌情報 |
号 34,
p. 101-111,
発行日 1982-09
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