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What is the boiling point of water in space? Replies: The boiling point of water is fixed by its temperature, and the vapor pressure of water at that temperature. So for example, if the water is at 100 C. the boiling point is 100 C. at a pressure of 1 atm (which is equal to 760 mm of Hg).
cwater = 1 calorie/gm Â°C = 4186 J/kgÂ°C = 1 BTU/lb Â°F. A typical U.S. residential water heater will be taken as one which has a capacity of 40 U.S. gallons (= 320 pounds, 145 kg, 151 liters). The typical heating range will be taken to be from 60 Â°F to 140 Â°F (15.6 Â°C to 60 Â°C). The energy required to heat the water can be determined from the specific heat relationship. Q = cmÎT. The energy required to heat one tank of water over the specified range is then (1 BTU/lb Â°F)(320 lb)(140Â°F - 60 Â°F) = 25,600 BTU. or