5) (20 Pts.) A piece of fruit is wrapped with cellophane and a secondary polyethylene layer...

 

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5) (20 Pts.) A piece of fruit is wrapped with cellophane and a secondary polyethylene layer to maintain its moisture at a temperature of 10C. The cellophane has a thickness of 0.5 mm, the polyethylene layer has a thickness of 0.3 mm, and the combined area of the two layers is 0,2 square meters. The vapor pressure of water vapor inside the wrapping is 1.5 kPa, while the air outside contains water vapor at a pressure of 1.0 kPa. Given that the permeability of the cellophane is 2.0x 10-13 m solute (STP)/(s.m.atm), and the permeability of the polyethylene layer is 1.5x10 m solute (STP)/(s.m.atm). a) Draw a sketch of the system. b) What is the steady-state loss of water vapor through the wrapping in kilograms per hour? c) If the initial moisture content of the fruit is 50% and it is not acceptable to eat below a moisture content of 30%, is the fruit still good to eat after 2 weeks? 5) (20 Pts.) A piece of fruit is wrapped with cellophane and a secondary polyethylene layer to maintain its moisture at a temperature of 10C. The cellophane has a thickness of 0.5 mm, the polyethylene layer has a thickness of 0.3 mm, and the combined area of the two layers is 0,2 square meters. The vapor pressure of water vapor inside the wrapping is 1.5 kPa, while the air outside contains water vapor at a pressure of 1.0 kPa. Given that the permeability of the cellophane is 2.0x 10-13 m solute (STP)/(s.m.atm), and the permeability of the polyethylene layer is 1.5x10 m solute (STP)/(s.m.atm). a) Draw a sketch of the system. b) What is the steady-state loss of water vapor through the wrapping in kilograms per hour? c) If the initial moisture content of the fruit is 50% and it is not acceptable to eat below a moisture content of 30%, is the fruit still good to eat after 2 weeks?