When you consume food, it goes through mechanical and chemical digestion in the mouth and is then transported to the stomach. It then mixes with stomach acid and other enzymes. What type of digestion is taking place within the stomach?
Physical change
Absorption
Mechanical digestion
Chemical digestion

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.