Question

Question:

1 It is now time to put the turkey in the oven. You put the 7kg uncooked, raw turkey initially at 32°F in a 125- gram aluminum pan initially at 69.8°F (C of Al =900J/kg*C ) and set it in the oven. Of course, a good turkey needs to be 176°F internally. Assume that the aluminum pan and the turkey reach the same final equilibrium temperature. Solve for the specific heat capacity of the turkey if the oven delivers 830kJ of energy to the system.

2/ Now that the turkey has been in the oven for quite some time, it is now time to get the gravy ready. First, you will need to put a circular aluminum sauce pan with a 12-cm diameter and a thickness of 8-mm on the stovetop and turn on the burner. Now you 120-gram mix the gravy contents with 360-grams of water. Assume that the latent heat of evaporation for gravy is similar to that of water, which is Lv' = 2260 KJ/Kg and that the thermal conductivity constant for aluminum is 220 J/s*m*C.

a) If the rate electric stovetop has a heat transfer rate of 2.3 kW, solve for the temperature difference across the bottom of the aluminum pan.

b) Suppose the gravy reaches a boiling point at 100°C. How long will it take all of the gravy to completely “evaporate” if it behaved like water.

Answer 1