Please Explain If the pH of gastric juice is 18 what is the

Please Explain

If the pH of gastric juice is 1.8, what is the amount of energy (AG) required for the transport of hydrogen ions from cells lining the stomach (internal pH of of these cells equals 7.4) into the lumen of the stomach? Assume that the electrical potential difference across the membrane separating cytoplasm of these cells and the interior of the stomach is -80.0 mV (inside of cells negative relative to the lumen of the stomach). Assume that the temperature is 37 degree C. The Faraday constant is 96.5 kJ. V-1. mol-1 and the gas constant is 8.314x 10-3 kJ. mol-1. K-1. Express your answer in kJ/mol.

Solution

deltaG=2.303RT(pHin-pHout)-nFEm=40.95kJ/mol