Water standing in the open at 32ºC evaporates because of the escape of some of the surface molecules. The heat of vaporization is approximately equal to ϵn, where ϵ is the average energy of the escaping molecules and n is the number of molecules per kilogram. (a) Find ϵ (b) What is the ratio of ϵ to the average kinetic energy of H2O molecules, assuming that the kinetic energy is related to temperature in the same way as it is for gases?
Water standing in the open at 32ºC evaporates because of the escape of some of the surface molecules. The heat of vaporization is approximately equal to ϵn, where ϵ is the average energy of the escaping molecules and n is the number of molecules per kilogram. (a) Find ϵ (b) What is the ratio of ϵ to the average kinetic energy of H2O molecules, assuming that the kinetic energy is related to temperature in the same way as it is for gases?
Shane Macguire , 9 Years ago
Grade upto college level
