Gastric juice is made up of substances secreted from parietal cells, chief cells, and mucous-secreting cells. The cells secrete HCl, proteolytic enzyme zymogens, mucin, and intrinsic factor. The pH of gastric juice is acidic, between 1-3. If the pH of gastric juice is 2.3, what is the amount of energy (AG) required for the transport of hydrogen ions from a cell (internaà pH of 7.4) into the stomach lumen? Assume that the potential difference across the membrane separating the cell 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 â The Faraday constant is 96.5 kJ V1 mol and the gas constant is 8.314x10-3 kJ mo1 K-1 Express your answer in kJ/mol. Number 40.82 kJ/ mol