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College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

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College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

A potential difference of 90.0 mV exists between the inner and outer surfaces of a cell membrane. The inner surface is negative relative to the outer surface. How much work is required to eject a positive sodium ion (Na+) from the interior of the cell?

To determine
The work required to eject sodium ion.

Explanation

Given info: Potential difference is 90.0 mV.

Explanation:

Formula to calculate the work required to eject sodium ion is,

W=eΔV

  • e is the elementary charge.
  • ΔV is the potential difference.

Substitute 1.6×1019C for e and 90.0 mV for ΔV

W=(1.6×1019C)(90

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