Water standing in the open at 34.5°C evaporates because of theescape of some of the surface molecules. The heat of vaporization(553 cal/g) is approximately equal to εn, where εis the average energy of the escaping molecules and n isthe number of molecules per gram. (a) Findε. (b) What is the ratio of ε tothe average kinetic energy of H2O molecules, assumingthe latter is related to temperature in the same way as it is forgases?
