Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Define Interfacial potential differences?
What is the source of an open-circuit, zero-current cell potential? When no electric current passes through the cell, the electric potential must be uniform within each bulk phase that is an electrical conductor, because otherwise there would be a spontaneous movement of charged particles (electrons or ions) through the phase. Electric potential differences in a cell without current therefore exist only at phase boundaries. The equilibrium cell potential is the cumulative result of these potential differences at interfaces between different conducting phases within the cell. An interfacial potential difference appears as a vertical step in a profile of the Galvani potential, as shown schematically in Fig.(a). The zero-current cell potential, Ecell, eq, is the algebraic sum of the interfacial potential differences within the cell.
When an external resistor is connected to the terminals to form a circuit, current passes through the cell and the cell performs electrical work on the surroundings. Figure (b) shows what happens to the potential profile in this case: the interfacial potential differences are still present within the cell, and the internal resistance of the electrical conductors causes Ecell to be reduced in magnitude compared to Ecell, eq. We shall next look briefly at the origin and consequences of potential differences at interfaces between (1) two different metals, (2) a metal and an electrolyte solution, and (3) two different electrolyte solutions. Keep in mind that these potential differences are theoretical concepts whose values cannot be measured experimentally.
Distillation under reduced pressure - Purification of organic compounds This process is employed for the purification of high boiling liquids and liquids that decompose at o
occurrence of p block elements
Q. What are boiler troubles? Discuss their consequences? Sol. Boiler feed water (water for steam making): water is very important engineering material which is mainly used fo
Equation shows the combustion of methane. a. By analogy, write a similar chemical equation using ethane, C 2 H 6 . b. Show this equation with Lewis structures. Answer:
Q. Describe about Coordination compounds? The complexes show a wide variety of physical and chemical properties which are quite different from normal salts. These differences
Q. Normal functioning of blood? The sixth position marked by X is either occupied by H 2 0 or 0 2 molecules. Impotant thing to note is that Fe 2+ in hemoglobin does not get o
3 kinds of isomerism indienes alkynes
I have 4 assignments for unit 22 chemistry btec level. Are you able to do my assignments by friday?
solvent rates on the rate of reaction
which one is more stable cis or trans
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd