Comprehensive Treatise of Electrochemistry: Electrodics: by N. Ibl (auth.), Ernest Yeager, J. O’M. Bockris, Brian E.

By N. Ibl (auth.), Ernest Yeager, J. O’M. Bockris, Brian E. Conway, S. Sarangapani (eds.)

It is now time for a accomplished treatise to examine the full box of electrochemistry. the current treatise was once conceived in 1974, and the earliest invites to authors for contributions have been made in 1975. The final touch of the early volumes has been not on time through different factors. there was no try to make each one article emphasize the latest state of affairs on the cost of an total assertion of the trendy view. This treatise isn't a set of articles from fresh Advances in Electro­ chemistry or glossy facets of Electrochemistry. it truly is an try at creating a mature assertion concerning the current place within the significant sector of what's most sensible checked out as a brand new interdisciplinary box. Texas A & M collage John O'M. Bockris collage of Ottawa Brian E. Conway Case Western Reserve collage Ernest B. Yeager Texas A & M college Ralph E. White Preface to VoluIJJe eight The prior 3 many years have obvious the quick evolution of the delivery points of electrochemical engineering right into a formal a part of electrochemistry in addition to chemical engineering. With minor exceptions, besides the fact that, this topic has now not been systematically coated in any treatise or fresh electrochemical textual content. The editors think that the remedy during this quantity will serve the function.

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5). FUNDAMENTALS OF TRANSPORT PHENOMENA 9 Note that in the case when the flux is referred to the velocity of a species, there are likewise n - 1 independent equations such as (3)t because this equation need not be written for the species taken as the reference. Let us consider a simple example-a binary mixture of water (A) and sucrose (B). If the water is taken as reference we have L1A = L1B = L~A = 0 and the Eq. (3') reduces to (3") In this case there is only one independent driving force and one independent phenomenological coefficient.

12)]. From Eqs. 1) one obtains, upon some rearrangement,(1) i+ = z+FN+ = -zJv+qjJcT(f+-CA)-l Vcf+- + jt~ (56) with a similar equation for the anion. , v+ and 11_ are the number of cations and anions formed when 1 molecule of neutral electrolyte dissociates). f+- is the mean molar activity coefficient and cf+- thus represents the activity of the neutral electrolyte. qjJ is the diffusion coefficient of the- neutral electrolyte, qjJ = qjJA+qjJA-(Z+ - z_) Z+qjJA+ - Z-qjJA- (57) It is defined in a way quite similar to that for the diffusion coefficient of the neutral electrolyte in an ideal dilute solution [Eq.

This aspect, which points out the analogy between mass and momentum transport, will be worked out more fully in Chapter 3. For a more detailed discussion of the Navier-Stokes equation the reader is referred to the literature. (l,8-1O)t In some circumstances heat transport has to be considered in addition to mass and momentum transport. A conservation equation analogous to Eq. (1Ia) holds for heat transport. 4), mainly from the viewpoint of the analogy with mass transport. However, heat transport in electrolytic systems will not be treated any further in this volume.

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