Question

20. ice cream contains 4% protein, 13% lipids and 21% carbohydrates. Please recall: carbohydrates- 4 kCal/g, lipids - 9 kCal/g and proteins - 4 kCal/g. Ice cream has a density of 0.574 kg/L. What temperature change would you expect to see in the water portion (2,500 g) of a bomb calorimeter when evaluation the energy content of a 20 g sample of ice cream? 21. Extra Credit (10 pts.): Two thousand (2,000) pigs at the growing-finishing stage (40 kg) are housed at a temperature (T) of 15 C. The growing-finishing pigs produce 3.3 J/skg of sensible and latent (total) heat at 15 C. The indoor relative humidity (RH,) should not exceed 70% and to accomplish this, the mass flow of ventilation air is maintained at 150 kg/s for a total heat loss of 150,750 J/s. The outdoor air conditions are T,--10 C and RH,-50%. The UA value for the structure is 10,050 J/sC. Will supplemental heat (Qsupp) be required for this structure, if so how much (J/s)?

Answer 1