Question

An 85 kg patient is to be cooled to 29°C for surgery by being placed in ice water. The power output of this patient is 60 W. It takes 20 minutes to bring his temperature down and the surgery lasts 2 hours 40 minutes. a) How many kilograms of ice must melt to cool down, b) how much ice to maintain at 0o assuming all other forms of heat transfer are negligible and that the ice water stays at 0°C? (assume an initial temperature of 37 oC, Cbody=.83 kcal/kg/0C, Hf=80 kcal/kg)

Answer 1