Problem 3: We wish to dry grain with a stream of hot air at 60C,1 bar For 5000kg of wet grain with moisture content 34wt%, how long would it take to dry the grain to 3% moisture if the air flow rate was 50 mol/ minute. You may assume that the leaving air contains 5mol% water vapor. MWair =29g/mol (HINT .. calculate how much water is picked up by the air in 1 minute \& divide into total water to be removed...you can thnk of it as a vat full of grain with air blowing through it.)