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.
Distinguish between van''t Hoff Method and Oswald Isolation Method. In each case give an expression for the rate of reaction.
Purpose
WHAT IS THE INITIAL CONCENTRATION
how many electrons does sulfur donate
Energy of orbit: (1) Increases as we move away from nucleus (2) Decreases as we move away from nucleus (3) Remains same as we move away from nucleus (4)None of the
Teflon - Halogen Derivatives 1. Teflon is plastic such as substance produced by the polymerisation of tetrafluoroethylene (CF 2 = CF 2 ). 2. Tetrafluoroethylene is made whi
Rubber - polymer It is a polymer that is able of returning to its original size, shape or length later than being deformed or stretched. It a kind of elastomer. Rubber is of tw
The f-block elements contains of two series of inner transition elements i.e. lanthanoids (the fourteen elements subsequent lanthanum) and actinoids (the fourteen elements subseque
Electromeric effect (1) The occurrence of movement of electrons from one atom to other in multi bonded atoms at the demand of attacking reagent is known as electromeric effect.
why all scandium salt are white
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