1. High-fructose corn syrup (HFCS) is used as a sweetener in many food and bever
ID: 701238 • Letter: 1
Question
1. High-fructose corn syrup (HFCS) is used as a sweetener in many food and beverage products. HFCS 42 is a commonly used HFCS; 1 kg of HFCS 42 has the following approximate composition: 440 grams glucose (CH1206)+ 320 grams fructoseH12)+240 grams water (H2O) a. How many gmol of each component are in 1.0 kg of HFCS 42? b. The density of HFCS 42 is 1.335 kg /1. what is the density of HFCS 42 in lbm/ft3 and lbm / gal? c Find the equivalent molar concentrations of each component in gmol /L, kgmol /m2, and Ibmol/t3. d. Find the mole fraction of each component in HFCS 42. e. A steady-state process uses 10001/ hr of HFCS 42. What is the corresponding mass flow rate in lbm hr? What is the molar flow rate of each component in lbmol/hr? f. In the first step of the process, HFCS 42 is diluted by addition of water. Indicate whether the dilution step causes each of the following in the diluted stream to increase, decrease, or stay the same, compared to the HFCS feed stream. Also indicate the dimensions of each quantity: Twater i.y fructose ili. Cgucose iv. ri V. mwater 9i vil. V g. A fully loaded tanker truck carries 4800 gal of HCFS 42. What is the weight of the HCFS 42 in each of the systems of units listed in Table 4.3 of Introduction to Chemical Engineering: Tools for Today and Tomorrow (5th Editionj? 2. Convert each of the following quantities to the units indicated: a. 133 lbm min1kg hr b, 15 hp kW d. 7 J/(kg·C) Btu /(lbm . F) 50 000 ft ibr kPa m'Explanation / Answer
Ans 2
Part a
= 133 lb/min x 0.454 kg/lb x 60min/hr
= 3622.92 kg/hr
Part b
= 15 hp x 746 W/hp x 1kW/1000W
= 11.19 kW
Part C
T(°F) = T(°C) × 9/5 + 32
T(°F) = 4 × 9/5 + 32 = 39.2 °F
Part d
= 7 J/kg-C x (1 BTU/1055.056 J) x (0.454 kg/lb) x 1C/1.8F
= 0.00167 BTU/lb-°F
Part e
= (50000 ft-lbf) x (4.448 N/lbf) x ( 0.305m/ft)
= 67832 N-m x (m2/m2)
= 67832 N/m2 x m3
= 67832 Pa-m3 x 1 kPa/1000Pa
= 67.832 kPa - m3
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