The patch is a cylindrical disk 3mm thick with a radius of 1 cm. the drug is initially at a concentration of 50 mm. assume that the concentration in the adjacent skin is much less than the concentration in the patch.

The air in an automobile tire with a volume of 0.015 m3 is at 32°c and 140 kpa gage. determine the amount of air that must be added to raise the pressure to the recommended value of 206 kpa gage. assume the atmospheric pressure to be 128 kpa and the temperature and the volume to remain constant.[r-0.287 kj/kgk]