Direction: In a muscle, the extracellular and intracellular concen-trations of Na+ are 150 mM and 12 mM and those of K+ are 2.7 mM and 140 mM respectively. Assume that the temperature is 25°C and that the membnine potential is – 60 mV, with the interior more negatively charged than the exterior.
(R = 8.314 J mol–1 K–1; F = 96.45 kJ mol–1 V–1)
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The free energy change for the transport of three Na+ out of the cell is
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- + 1.5 kJ/mol
- + 17.4 kJ/mol
- + 18.9 kJ/mol
- + 36.3 kJ/mol
Correct Option: D
NA
