The benzoyl peroxide initiated polymerization of a monomer follows the simplest kinetic scheme, that is, Rp = kp[M]( f kd[I]/kt ) 1/2 with all rate constants and f being independent of conversion. For a polymerization system with [M]O = 2 M and [I]O = 10-2 molar, the limiting conversion p∞ is 10%. To increase p∞ to 20%:

To save energy, the air supply to a 2000 ft office has been shut off overnight and the room temperature has dropped to 40°f. in the morning, the thermostat is reset to 70°f and warm air at 120 f begins to flov in at 200ft'/min. the air is well mixed within the room, and an equal mass flow of air at room temperature (changing with time) is withdrawn through a return duct. the air pressure is nearly 1 atm everywhere. ignoring heat transfer with the surroundings and kinetic and potential energy effects, estimate how long it takes for the room temperature to reach 70°f. plot the room temperature as a function of time.