A patient weighing 50 kg is given an intravenous infusion of 1 L of saline solution at 25C. The specific heat capacity of saline solution is 4.18 J/gC, and its density is 1 g/mL. Assume that the infusion is carried out at constant pressure and that the saline solution is initially at atmospheric pressure. During the infusion, the saline solution is heated to 37C, and 20% of the saline evaporates. The heat of the vaporization of water is 40.7 J/g. How much saline solution must be infused to compensate for the heat absorbed by the evaporated water and maintain the patient's body temperature at 37C?