prior to science lab, maria had been drinking a can of soda. when she walked into the lab she set it down on the hot plate at her station. she heard a liquid beginning to boil, and realized that the previous students had forgotten to turn off the hotplate and the boiling noise was from the remaining soda in the can. without thinking, she picked up the can with her bare hands, and put it upside down into the sink which was half full of liquid. immediately the can crushed as though it was going to be recycled.
what do you think is happening to the soda and air in the can?

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.