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- W2017994093 abstract "This review concerns the concept of multi-excitation entropy (MEE) and its consequences. When a fluctuation involving a large number of excitations occurs, for example, when a large activation barrier is overcome, there must be a large entropy associated with this fluctuation. First, the concepts of free energy and entropy, of activated processes and the Arrhenius and Eyring equations are reviewed. The tendency to neglect entropy, whose value is difficult to determine, in modelling kinetic processes, is briefly discussed. We then present a review of the experimental observations of the phenomenon which is variously known as the Compensation Law, the Isokinetic Rule and the Meyer–Neldel Rule (MNR). These observations include examples from chemistry, condensed matter physics, biology and geology. Arguments are then presented for the importance of entropy and particularly of MEE in both kinetics and thermodynamics, when activation energies are large. After a discussion of non-entropic models of compensation, we present results which support the MEE model as an explanation of MNR. The behaviour of systems with low activation energies, or at high temperatures, to which the MEE model does not apply, is then discussed." @default.
- W2017994093 created "2016-06-24" @default.
- W2017994093 creator A5002846603 @default.
- W2017994093 creator A5014608481 @default.
- W2017994093 creator A5069187598 @default.
- W2017994093 date "2006-03-13" @default.
- W2017994093 modified "2023-09-29" @default.
- W2017994093 title "Multi-excitation entropy: its role in thermodynamics and kinetics" @default.
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