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Heat of vaporization of water = 540 cal/g m=1000 g energy supplied = 5.4 kcal=5400 cal T1=T2=100 deg. C so all energy is used to convert to steam mass of steam produced = 5400 cal /(540 cal/g) =5400/540 cal *g/cal =10 g
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A patient arrives in the emergency room with a burn caused by steam. Calculate the heat that is released when 17.4 g of steam at 100. âC hits the skin, condenses, and cools to body temperature of 37.0 âC. (For water, 540 cal (2260 J) is needed to convert 1 g of water to vapor at 100 âC.)
The heat of vaporization of water is 540 cal/g. How many calories are required to vaporize 5.00 kg of boiling water?