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r I (ll; use raga Evaporation 1' Why does it feel colder When YOU swim at a pool on a wind d Y7 y a . 3. Briey explain from a molecu] . , ing process. ar pomt ofwew why evaporation is a cool- 4, When hot water rapidly evaporates. the result can be dramatic. Consider 4 g of boiling water spread over a large surface so that 1 g rapidly evaporates. Suppose further that the surface and surroundings are very cold so that all 540 calories for evaporation come from the remaining 3 g of water. a. How many calories are taken from each gram of water? b. How many calories are released when 1 g of 100C water cools to 0C? If!!! c How many calories are released when 1 g of 0C water changes to 0C ice? /__f d. What happens in this case to the remaining 3 g of boiling water when 1 g rapidly evaporates? // //' CONCEPTUAL PHYSICS Chapter 23 Change of Phase 1