Introduction to Chemical Engineering Processes/Chapter 3 Practice Problems/Solutions

Problem 1 D. (1.06 g/m^3)*(1 m^3/264.17 Gal.) = 4.01E-3 grams Problem 2 volume of Toluene = 53.199 cm^3 Problem 3 Important Conversion Factor : 1 ream = 500 sheets A. (10,000 reams)*(500 sheets/1 ream)*(1 book/250 sheets) = 20,000 books (30,000 Lbs. ink)*(1 book/0.2 Lbs. ink) = 150,000 books Paper is the limiting resource @ 20,000 books. B. (1-0.04)*(20,000 books) = 19,200 books North America : (19,200 books)*(0.15) = 2880 books South America : (19,200 books)*(0.10) = 1920 books Europe : (19,200 books)*(0.20) = 3840 books Africa : (19,200 books)*(0.20) = 3840 books Asia : (19,200 books)*(0.25) = 4800 books Australia : (19,200 books)*(0.10) = 1920 books Cost of Printing (20,000 books)*($0.50) = $10,000 Shiping Cost North America : (2880 books)*($0.05) = $144 South America : (1920 books)*($0.08) = $153.6 Europe : (3840 books)*($0.10) = $384 Africa : (3840 books)*($0.20) = $768 Asia : (4800 books)*($0.12) = $576 Australia : (1920 books)*($0.15) = $288 Total Shiping Cost = $2,313.6 Basis : 1 book sell = $1.00 Total Daily Production Cost : $10,000 + $2,313.6 = $12,313.6 Daily Max Profit : $19,000 - $12,313.6 = $6,886.4 C. Selling 12,314 books/day would return a profit of $0.40/day D. Pounds of Ink North America : (2880 books)*(0.02 Lbs ink) = 57.6 Lbs. ink South America : (1920 books)*(0.02 Lbs ink) = 38.4 Lbs. ink Europe : (3840 books)*(0.02 Lbs ink) = 76.8 Lbs. ink Africa : (3840 books)*(0.02 Lbs ink) = 76.8 Lbs. ink Asia : (4800 books)*(0.02 Lbs ink) = 38.4 Lbs. ink Australia : (1920 books)*(0.02 Lbs ink) = 96.0 Lbs. ink Sheets of Paper North America : (2880 books)*(250 sheets) = 720,000 Sheets South America : (1920 books)*(250 sheets) = 480,000 Sheets Europe : (3840 books)*(250 sheets) = 960,000 Sheets Africa : (3840 books)*(250 sheets) = 960,000 Sheets Asia : (4800 books)*(250 sheets) = 1,200,000 Sheets Australia : (1920 books)*(250 sheets) = 480,000 Sheets E. Improve the Profit Margin -Cheaper paper feed stock -Recycle defective books for tax incentives -Use recycle paper feed stock for tax incentives -Cheaper ink feed stock -Use environmentally friendly feed stock for tax incentives -Reduce number of defective books produced -Sell the book at higher prices where the market will allow