V2p kV

8nn0z2e2 DkT

The treatment for a plane charged surface is due to Gouy and Chapman (after defining):

zep . zep0

Eqn [26] can be written as: d2y

-rpr- = k2 sinh y d2x with the boundary conditions at:

For the case where y0 is small, for example for univalent ions at room temperature, < 25 mV, the p = p0 exp - Khx

setting x = hx as the separation distance.

The quantity 1/k is the distance from the surface where the potential in the solution reaches 1/e (= 0.3679) of its value at the surface; the plane 1/k is used to represent the thickness of the diffuse layer adjacent to the surface. The charge density of the solid surface can be obtained from a knowledge of ^(x) vs x since:

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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