Water standing in the open at 33.4°C evaporates because of the escape of some of the surface molecules. The heat of vaporization (530 cal/g) is approximately equal to En, where t is the average energy of the escaping molecules and n is the number of molecules per gram. (a) Find c. (b) What is the ratio of c to the average kinetic energy of H₂O molecules, assuming the latter is related to temperature in the same way as it is for gases?
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