a product having a moisture content of 60% (wet basis) is dried in a tunnel-type dryer at a rate of 20 kg / hr. Desiccant air is supplied at a rate of 6000 kg air / hour at 50 • C and 10% RH and exits the dryer at 25 • C and equilibrium conditions with the product at 40% RH. determine the moisture content of the product leaving the dryer, as well as the water activity of the product

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