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Ostrovityanka [42]
3 years ago
7

Potassium ions (K+) move across a 7.0 -mm- thick cell membrane from the inside to the outside. The potential inside the cell is

−70.0 mV, and the potential outside is zero. What is the change in the electrical potential energy ΔU electric of the potassium ions as they move across the membrane?
Physics
1 answer:
Reil [10]3 years ago
7 0

Explanation:

Relation between potential energy and charge is as follows.

           U = qV

or,    \Delta U = q \times \Delta V

                   = 1.6 \times 10^{-19} \times 70 \times 10^{-3}

                   = 112 \times 10^{-22} J

or,                = 1.12 \times 10^{20} J

Therefore, we can conclude that change in the electrical potential energy \Delta U is 1.12 \times 10^{20} J.

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