The mass transfer characteristics of a dryer were determined in an experiment in which mashed potato, saturated with water, was formed into a horizontal insulated slab with its upper surface exposed to a stream of warm air. The wet and dry bulb temperatures of the air at steady state were 25 and 60°C, respectively. Assuming constant rate drying and a film heat transfer coefficient of 120 W/m^2K, calculate the heat flux between the air and the slab, the molar flux of water from the slab, and the gas film mass transfer coefficient (in molar units). Take atmospheric pressure to be 101.3 kPa. The mass diffusivity of water in air at 25°C is DAB = 2.5 x 10^-5 m^2/s.