Help find work done associated with electric potential

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Homework Help Overview

The discussion revolves around calculating the work done to move a sodium ion from inside a cell to outside, given a specific electric potential difference and membrane thickness. The subject area includes concepts from electrostatics and electric potential.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants explore the relationship between electric potential, charge, and work done, questioning how to define potential difference and the charge of a sodium ion. There are attempts to derive equations related to work and electric fields.

Discussion Status

Participants are actively discussing the definitions and relationships between electric potential, charge, and work. Some have provided equations, while others seek clarification on the charge of the sodium ion and its implications for the calculations. There is no explicit consensus yet, but various interpretations and approaches are being explored.

Contextual Notes

Participants are working within the constraints of a homework problem, which may limit the information available for discussion. The original poster has set the inside cell potential energy to zero, which is a point of consideration in the calculations.

trustabdy
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given that the electric potential is .70 V higher outside the cell than inside the cell, and that the cell memberane is .1X10^-6 thick. calculate that work that must be done (in joules) to move one sodium ion from inside the cell to outside

i know V= .70V distance is .1X10^-6
i made the inside the cell potential energy is 0

?
 
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What's the definition of potential difference?
 
W = Fd = qEd

E=Volts/distance

how do i find the charge (q)
 
amount of energy that would be required to move an object from one place to another against various types of forces.

ok
 
trustabdy said:
W = Fd = qEd

E=Volts/distance
Combine these two equations.

how do i find the charge (q)
What's the charge on a sodium ion? (What's an ion?)
 
is it one electron since sodium is in the first column in the periodic table
 
The charge on the sodium ion is +e, since it is missing an electron. (That's what makes it an ion.)
 
W = Fd = qEd
q= charge on electron
d= distance
E= Volts/distance
am i right?
 
Combine this:
trustabdy said:
W = Fd = qEd
With this:
E= Volts/distance
To get a simpler equation.
 
  • #10
trustabdy said:
W = Fd = qEd
q= charge on electron
d= distance
E= Volts/distance
am i right?

so this W=qEd is the correct equation to find work done in joules. or are there any other equations
 

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