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  • Articles  (2)
  • Enthalpies of reaction  (1)
  • Mixed micelles  (1)
  • alcohol-water mixture  (1)
  • Apparent molar heat capacities
  • 1980-1984  (2)
Collection
  • Articles  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Chemical equilibrium model for the thermodynamic properties of mixed aqueous micellar systems: Application to thermodynamic functions of transfer (1984)
    Springer
    Journal of solution chemistry 13 (1984), S. 1-25 
    Details
    ISSN: 1572-8927
    Keywords: Mixed micelles ; surfactant ; alcohol-water mixture ; solubilization ; thermodynamic function of transfer ; volume ; enthalpy ; hydrophobic solutes ; heat capacity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Mixed micelles can be formed in water between various pairs of hydrophobic solutes such as surfactants, alcohols and hydrocarbons. These systems can often be studied through the thermodynamic functions of transfer of one of the solutes, usually kept near infinite dilution, from water to an aqueous solution of the other solute. When mixed micelles are formed, these functions change significantly, and often go through extrema, in the region where the binary system micellizes or undergoes some microphase transition.Three main effects are responsible for the observed trends: pair-wise interactions between both solutes in the monomeric form, a distribution of the reference solute between the aqueous and micellar phases and a shift in the monomer-micelle equilibrium in the vicinity of the reference solute. Simple equations can be derived for these three effects which can account for the sign and magnitude of the observed trends using parameters which are derived for the most part from the two binary systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00648588
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  • 2
    Electronic Resource
    Electronic Resource
    Enthalpies of reaction and reaction rates by flow microcalorimetry: Ester hydrolysis in basic medium (1980)
    Springer
    Journal of solution chemistry 9 (1980), S. 59-73 
    Details
    ISSN: 1572-8927
    Keywords: Enthalpies of reaction ; heats of reaction ; kinetics ; ester hydrolysis ; microcalorimetry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The conditions under which the Picker flow microcalorimeter can be used to measure enthalpies and rates of reactions were investigated. For this purpose, systematic studies were made of the enthalpies of neutralization of HCl, HBr, HNO 3 , acetic, proprionic, and butyric acids with NaOH, enthalpies of hydrolysis of methyl and ethyl acetate with NaOH, and the reaction rates of the ester hydrolysis with NaOH. The general procedure and various sources of error are discussed and it is concluded that enthalpies of slow reactions can be measured to about 1% when the calorimeter is operated in the quasi-isothermal mode and the reaction rates to about 3% when operated in the quasi-adiabatic mode.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00650137
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    Paper (German National Licenses)
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