The reaction ab(aq)→a(g)+b(g) is second order in ab and has a rate constant of 0.0164 m −1 ⋅ s −1 at 25.0 ∘ c . a reaction vessel initially contains 250.0 ml of 0.104 m ab which is allowed to react to form the gaseous product. the product is collected over water at 25.0 ∘ c . part a how much time is required to produce 142.0 ml of the products at a barometric pressure of 707.3 mmhg . (the vapor pressure of water at this temperature is 23.8 mmhg .)

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.