In a paper process, a continuous roll of wet paper (width s.0 meters) is dried by passing it through a series of driers. in one short section, hot dry air passes over a 1.2 meter flat section of the roll. this section is maintained at 60°c and 0.75 atm, and dry air flows over this flat section at a relative velocity of 6.25 m/s in the length direction. the physical properties of liquid water at 60°c and 1.0 atm are: . vapor pressure - o0.197 atm molecular weight- 18 kg/kmol liquid density- 983 kg/m liquid viscosity- 0.4688 x10 kg/ms the physical properties of dry air or air-water gas stream at 60°c and 1.0 atm are: . gas viscosity-1.90x105 kg/ms molecular weight-29 kg/kmol diffusion coefficient -2.91x10s m2/s use an appropriate correlation to calculate the mass-transfer coefficients ke and ky, and the evaporation rate in this drying section in kilograms per second (kg/s)