physics

for the current density equation (I) , solve for dV/dx when I = 0
I = - [ uz2F[C] dV/dx + uzRT d[C]/dx]

According to your equation.

dV/dx= uzRT/uz2[C] d[C]/dx

I am uncertain what your symbols mean.

It's supposed to be the current density equation I think??
My teacher also gave the form:
I = -(ƒÊ(z^2)F(C))(dv/dt)+ (UZRT d(C)/dx))

C is concentration.
z valence
F Faraday constant
U I am not sure of
R is gas constant
T is temp

and he wanted us to set I to 0 and solve.

also, he wanted us to show how
RT/zF ln (C)out/(C)in ends up to be
58millivolts log10 (C)out/(C)in
with constants:

deg K = absolute T = deg C + 273.16
1 cal = 4.2 Joules
1V = 1Joule/Coulomb
F = Faradays�f Constant (96,480 Coulombs/mol)
R = Gas Constant (1.987 cal / mol degK)
e = elementary electrical charge = 1.602x10-19 C
Avogadro�fs Number 6.02x1023 molecules/mole

I am really confused about the ln and log10 and how to get 58

dV/dx= uzRT/uz2[C] d[C]/dx
integrate with respect to x to get
v= uzRT/uz2 ln(C)

μ is mobility of ions in solution in units of cm2v-1s-1

  1. 👍 0
  2. 👎 0
  3. 👁 233
asked by Ann

Respond to this Question

First Name

Your Response

Similar Questions

  1. ET3034TUx Solar Energy

    The current density of an ideal p-n junction under illumination can be described by: J(V)=Jph−J0(eqVkT−1) where Jph is the photo-current density, J0 the saturation-current density, q the elementary charge, V the voltage, k the

    asked by Anon on October 16, 2013
  2. Solar Energy Help ASAP

    The current density of an ideal p-n junction under illumination can be described by: J(V)=Jph−J0(eqVkT−1) where Jph is the photo-current density, J0 the saturation-current density, q the elementary charge, V the voltage, k the

    asked by Anonymous on October 17, 2013
  3. Homework Help: Solar Energy Please HelpASAP

    d) In the up-convertor 1, two photons are converted into one photon with 100% conversion efficiency. If all photons with energy above that of the band gap of a-SiC:H are absorbed in the a-SiC:H layer, in which spectral range can

    asked by Johnny on December 5, 2013
  4. Physics

    The current density of an ideal p-n junction under illumination can be described by: J(V)=Jph−J0(e^qV/kT−1) where Jph is the photocurrent density, J0 the saturation current density, q the elementary charge, V the voltage, k

    asked by qwerty on October 3, 2014
  5. physics

    The quantity of charge q (in coulombs) that has passed through a surface of area 2.08 cm2 varies with time according to the equation q = 4t3 + 5t + 6, where t is in seconds. (a) What is the instantaneous current through the

    asked by priya on September 5, 2013
  6. Chem

    If the molar mass of monatomic deuterium (D) is 2.0141 g, then what is the density of diatomic deuterium (D2) gas at 25.0°C and 1.00 atm? I know the equation for density is: d=m/v What equation(s) do I need to use to solve this?

    asked by Ginger on April 19, 2008
  7. physics

    The quantity of charge q (in coulombs) that has passed through a surface of area 2.08 cm2 varies with time according to the equation q = 4t3 + 5t + 6, where t is in seconds. (a) What is the instantaneous current through the

    asked by suhani on September 5, 2013
  8. physics

    Drift velocity is best defined as a. the relationship between current and current density b. the number of mobile electrons per volume c. the number of mobile electrons per length d. the flux of the current density through a given

    asked by Libby on March 23, 2008
  9. phys102

    a copper wire has a diameter of 1.02mm,the wire carries a constant current of 1.67A,the density of the free electrons is 8.5X10^28 e/m^3.calculate the current density and drift velocity

    asked by kabelo on August 14, 2010
  10. physics

    Consider a long wire where the current density is not uniform but instead increases as you approach the center of the wire, so that at a distance r from the center the current density is J(r)= I/ 2PiRr. Find the magnetic field

    asked by Jessica on April 8, 2008

More Similar Questions