Determination of the interaction free energy dispersion in sorptive systems by relaxation kinetics methods

1986 ◽  
Vol 108 (5) ◽  
pp. 1087-1088 ◽  
Author(s):  
David B. Marshall ◽  
James W. Burns ◽  
David E. Connolly
Keyword(s):  
Free Energy ◽  
Energy Dispersion ◽  
Relaxation Kinetics ◽  
Interaction Free Energy

scholarly journals On factors affecting surface free energy of carbon black for reinforcing rubber

2020 ◽  
Vol 9 (1) ◽  
pp. 170-181 ◽  
Author(s):  
Shangyong Zhang ◽  
Ruipeng Zhong ◽  
Ruoyu Hong ◽  
David Hui
Keyword(s):  
Free Energy ◽  
Carbon Black ◽  
Surface Free Energy ◽  
Surface Activity ◽  
Gas Flow ◽  
Influential Factors ◽  
Chromatographic Column ◽  
Factors Affecting ◽  
Carrier Gas Flow

AbstractThe surface activity of carbon black (CB) is an important factor affecting the reinforcement of rubber. The quantitative determination of the surface activity (surface free energy) of CB is of great significance. A simplified formula is obtained to determine the free energy of CB surface through theoretical analysis and mathematical derivation. The surface free energy for four kinds of industrial CBs were measured by inverse gas chromatography, and the influential factors were studied. The results showed that the aging time of the chromatographic column plays an important role in accurate measurement of the surface free energy of CB, in comparison with the influences from the inlet pressure and carrier gas flow rate of the chromatographic column filled with CB. Several kinds of industrial CB were treated at high temperature, and the surface free energy of CB had a significant increase. With the increase of surface free energy, the maximum torque was decreased significantly, the elongation at break tended to increase, the heat generation of vulcanizates was increased, and the wear resistance was decreased.

The Equilibrium and the Determination of D00 (H—CN)

1975 ◽  
Vol 53 (16) ◽  
pp. 2365-2370 ◽  
Author(s):  
Don Betowski ◽  
Gervase Mackay ◽  
John Payzant ◽  
Diethard Bohme
Keyword(s):  
Free Energy ◽  
Standard Enthalpy ◽  
Transfer Reaction ◽  
Standard Free Energy ◽  
Proton Transfer Reaction ◽  
Enthalpy Change ◽  
Standard Free Energy Change ◽  
Flowing Afterglow ◽  
Standard Enthalpy Change

The rate constants and equilibrium constant for the proton transfer reaction [Formula: see text] have been measured at 296 ± 2 K using the flowing afterglow technique: kforward = (2.9 ± 0.6) × 10−9 cm3molecule−1s−1, kreverse = (1.8 ± 0.4) × 10−10 cm3 molecule1 s−1, and K = 16 ± 2. The measured value of K corresponds to a standard free energy change, ΔG296°, of −1.6 ± 0.1 kcal mol−1 which provides values for the standard enthalpy change, ΔH298°= −1.0 ± 0.2 kcal mol−1, the bond dissociation energy, D00(H—CN) = 124 ± 2 kcal mol−1, and the proton affinity, p.a.(CN−) = 350 ± 1 kcal mol−1.

scholarly journals Determination of the Critical Stress Associated with Dynamic Phase Transformation in Steels by Means of Free Energy Method

Metals ◽  
2018 ◽  
Vol 8 (5) ◽  
pp. 360 ◽  
Author(s):  
Clodualdo Aranas ◽  
Samuel Rodrigues ◽  
Ameth Fall ◽  
Mohammad Jahazi ◽  
John Jonas
Keyword(s):  
Free Energy ◽  
Phase Transformation ◽  
Energy Method ◽  
Critical Stress ◽  
Dynamic Phase

Nucleus-size pinning for determination of nucleation free-energy barriers and nucleus geometry

2018 ◽  
Vol 148 (18) ◽  
pp. 184104 ◽  
Author(s):  
Abhishek K. Sharma ◽  
Fernando A. Escobedo
Keyword(s):  
Free Energy ◽  
Nucleus Size ◽  
Energy Barriers

Fundamentals of Electrochemistry

2021 ◽  
pp. 389-411
Author(s):  
Christopher O. Oriakhi
Keyword(s):  
Free Energy ◽  
Equilibrium Constant ◽  
Electrode Potential ◽  
Electrolytic Cell ◽  
Electrochemical Cells ◽  
Standard Electrode Potential ◽  
Cell Potential ◽  
Oxidation Reduction ◽  
Constant Determination

Fundamentals of Electrochemistry build on basic oxidation-reduction reactions and present an overview of their use in electrochemical cells. The construction and operation of a galvanic cell is described with cell diagrams including the function of the electrodes (cathode and anode). Also covered are the standard electrode potential and its applications, including calculations involving the standard electrode potential, the Gibbs free energy and the equilibrium constant, determination of the spontaneity in redox reactions and the dependence of cell potential on concentration (the Nernst equation). Finally a qualitative and quantitative overview of electrolysis is presented with a focus on predicting the products of electrolysis and the stoichiometry of electrolysis, which relates the charge flowing through an electrolytic cell to the amount of products formed at the electrodes.

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