Question

In evaporation process due to escape of high energy molecules the molecules the average k. E of remaining molecules

Answer 1

Answer:

A liquid is comprised of molecules that are in constant motion, traveling at different rates. The average speed of these particles depends on the liquids temperature. A rise in temperature increases molecular velocity as well as aggregate kinetic energy. If molecules gain enough energy, their fast-moving particles will begin to bump against their neighbors. Eventually, particles near the liquids surface will impart sufficient speed, and therefore sufficient kinetic energy, to cause the surface particles to propel away from the liquid in the form of gaseous molecules or, more simply, as water vapor.

As the particles with the highest kinetic energy levels evaporate, the average kinetic energy of the remaining liquid (sweat) decreases. Because a liquids temperature is directly related to the average kinetic energy of its molecules, the liquid cools as it evaporates.

Hence, when some liquid evaporates, the average speed of the molecules remaining will decrease because the more energetic molecules have left.

Answer 2

Since the kinetic energy of a molecule is proportional to its temperature, evaporation proceeds more quickly at higher temperatures. As the faster-moving molecules escape, the remaining molecules have lower average kinetic energy, and the temperature of the liquid decreases.