Excess volume, excess enthalpy, and excess heat capacity of the binary liquid systems ethanenitrile or 2-butanone + 2,2,4-trimethylpentane

1991 ◽  
Vol 36 (3) ◽  
pp. 326-329 ◽  
Author(s):  
H. Kalali ◽  
F. Kohler ◽  
P. Svejda
Keyword(s):  
Heat Capacity ◽  
Excess Volume ◽  
Excess Enthalpy ◽  
Excess Heat Capacity ◽  
Excess Heat ◽  
Binary Liquid ◽  
Liquid Systems

On Temperature Dependence of Excess Gibbs Energy

1999 ◽  
Vol 64 (7) ◽  
pp. 1093-1099 ◽  
Author(s):  
Ivona Malijevská ◽  
Anatol Malijevský
Keyword(s):  
Heat Capacity ◽  
Gibbs Energy ◽  
Temperature Dependence ◽  
Excess Gibbs Energy ◽  
Excess Enthalpy ◽  
Excess Heat Capacity ◽  
Wilson Equation ◽  
Excess Heat ◽  
Energy Excess ◽  
Wilson And Nrtl Equations

Temperature dependence of GE is discussed for three widely used equations linear and nonlinear in parameters. It is shown that the Wilson equation predicts always positive excess heat capacity regardless of values of its parameters. Several temperature modifications of the Redlich-Kister, Wilson and NRTL equations are discussed with respect to the sign of the excess Gibbs energy, excess enthalpy and excess heat capacity.

Enthalpies of Mixing for Binary Liquid Mixtures of Monocarbonic Acids and Alcohols

1985 ◽  
Vol 40 (9) ◽  
pp. 947-951 ◽  
Author(s):  
R. Haase ◽  
R. Lorenz
Keyword(s):  
Aliphatic Alcohol ◽  
Excess Enthalpy ◽  
Excess Heat Capacity ◽  
Enthalpy Of Mixing ◽  
Liquid Mixtures ◽  
Binary Liquid ◽  
Molar Excess ◽  
Calorimetric Measurements ◽  
Liquid Systems ◽  
Molar Excess Heat Capacity

We present the results of calorimetric measurements of the molar enthalpy of mixing (molar excess enthalpy) H̄E as a function of temperature and composition (described by the mole fraction x of the alcohol) for 18 binary liquid systems consisting of an aliphatic monocarbonic acid (formic, acetic, propionic, butyric, valeric acids) and an aliphatic alcohol (methanol, ethanol, 1-propanol. 2-propanol, 1-butanol, 2-methyl-2-propanol). The experiments cover temperatures between 298.15 K and 318.15 K and the whole range of compositions (usually nearly 40 compositions at each temperature). There is a great variety of behaviour as far as the function H̄E(x) for T= const is concerned. Many systems show endothermic mixing ( H̄E > 0), other systems exothermic mixing (H̄E < 0), again other systems partly endothermic, partly exothermic behaviour. There is one case (acetic acid + 2-methyl-2-propanol) where H̄E(x) changes its sign twice and the molar excess heat capacity exhibits unusually large negative values.

scholarly journals Simultaneous correlation of the excess enthalpy and W-shaped excess heat capacity of 1, 4-dioxane- n-alkane systems by PRSV-HVOS CEOS

2003 ◽  
Vol 68 (1) ◽  
pp. 35-46 ◽  
Author(s):  
Mirjana Kijevcanin ◽  
A.B. Djordjevic ◽  
Ivona Grguric ◽  
Bojan Djordjevic ◽  
Slobodan Serbanovic
Keyword(s):  
Heat Capacity ◽  
Equation Of State ◽  
Concentration Dependence ◽  
Excess Enthalpy ◽  
Excess Heat Capacity ◽  
Mixing Rule ◽  
Temperature Dependent ◽  
Excess Heat ◽  
Nrtl Equation

In this work the Peng-Robinson-Stryjek-Vera (PRSV) equation of state coupled with the Huron-Vidal-Orbey-Sandler (HVOS) rule was tested for the correlation of the excess enthalpy (HE) and the excess heat capacity (cp E) alone and simultaneously. The HVOS mixing rule incorporates the NRTL equation as the GE model. All calculations were performed using the linear and reciprocal forms of the temperature dependent parameters of the models. For all the evaluations the 1,4-dioxane+n-alkane systems were chosen having in mind the unusually W-shaped concentration dependence of cp E for these systems. The correlation of the HE and cp E data alone for all the investigated systems using four coefficients and for the simultaneous correlation of HE+cp E data using six coefficients of the temperature dependent parameters of the PRSV-HVOS models could be considered as being very satisfactory.

scholarly journals Excess Heat Capacity in Mo/Au Transition Edge Sensor Bolometric Detectors

2021 ◽  
pp. 1-1
Author(s):  
Ari David Brown ◽  
Regis Brekosky ◽  
Felipe Colazo-Petit ◽  
Matthew Greenhouse ◽  
James Hay-Wehle ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Transition Edge Sensor ◽  
Excess Heat Capacity ◽  
Excess Heat ◽  
Bolometric Detectors ◽  
Transition Edge
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