Which of the following correctly describes what happens to the kinetic energy of water when it changes from the solid state to the liquid state?

the kinetic energy of the molecules decreases.
the kinetic energy of the molecules increases then decreases.
the kinetic energy of the molecules increases.
there is no change in the kinetic energy of the molecules.

The small bags of silica gel you often see in a new shoe box are placed there to control humidity. despite its name, silica gel is a solid. it is a chemically inert, highly porous, amorphous form of sio2. because water vapor readily adsorbs onto the surface of silica gel, it acts as a desiccant. despite not knowing mechanistic details of the adsorption of water onto silica gel, from the information provided you should be able to make an educated guess about the thermodynamic characteristics of the process. predict the signs for δg, δh, and δs for the adsorption of water.