A potential difference of 122 mV exists between the inner and outer surfaces of

Question

A potential difference of 122 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? J A potential difference of 122 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? J A potential difference of 122 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? J

Explanation / Answer

The work done by the agent moving the charge out of the cell,

Winput = - Wfield = - (-delta PE) = q* delta V

W = (1.6 x 10-19)(0.122) = 1.952 x 10-20 J (Ans)

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