Calculate the energy stored in 1000 cm3 of gas at 80 MN/m2 at 290 K using STP as the datum

You oversee cooking a 30-lb turkey that is initially at 20 ̊C by exposing it to the 200 ̊C environment ofan oven with a convective heat transfer coefficient of 20 Wm-2 K-1 . Model the turkey as a cylinder withaspect-ratio of 1.0 (i.e., with equal length and diameter) and thermal properties that are close to those ofwater; k = 0.90 Wm-1K-1 ; cp = 4.2 kJkg-1 K-1 ; r = 1200 kgm-3 b. To be cooked, the temperature everywhere within the turkey must be raised to at least 90 ̊C. Howlong does it take for the center of the turkey to be cooked?c. Determine the surface temperature of the turkey when its center is first cooked.

Estimate the thermal conductivity of benzene at 30C.

A 3 meter tall aluminum tank with a 7 meter diameter is completely filled with ethanol. The empty weight of the tank is 250 kg. If the ethanol starts at 25 deg C, and there is 3000 kJ of heat available for transfer, what final temperature can be reached? And, what percentage of the heat transferred does the ethanol and aluminum each account for? (ethanol density = .789 kg/L)

A 10 cm thick piece of beef steak will be frozen in the freezer room -40 ° C. This product has a moisture content of 73%, a density of 970 kg / m³, and a thermal conductivity (frozen) of 1.1 W / (m K). Estimate the freezing time. using the Plank equation. This product has an initial freezing temperature of -1.75 ° C, and the movement of air in the freezing room gives a convective heat transfer coefficient of 15 W / (m² K). t f =       hour

The plot to the right shows the 1-D steady-state solution to the Pennes bioheat equation with T = 37°C at x = 0 (body core) and T = 43°C at x = 0.01 (body surface). The thermal conductivity is 0.5 W m-l °C-'. This scenario describes some surface tissue thermal conductivity (WI(m°C)) 0.5 blood perfusion rate (1/5) T("C) 43 heating (e.g., laser). Which trace represents the highest value of the blood perfusion rate. 42 41 A 40 А. А В. В 39 38 E С.С 0.002 X(m) 0.010 0.004 0.006 0.008 D. D Е. Е

Answer: 24.187 °C

3 A continuous countercurrent adiabatic rotary drier is being designed for the production of 500 lb/h of a product containing 2% moisture from wet crystal containing 30% moisture, wet basis. The air entering the drier will have a dry-bulb temperature of 230°F and a wet-bulb temperature of 102°F. The air leaving the drier will be at a temperature of 115°F. Because of the small size of the crystals, the highest allowable air velocity is 10 lb dry air/ft2-min of drier cross section. Find: a. Dry air required (lb/min) b. Cross-sectional area of the drier c. Length of drier required if the volumetric coefficient of heat transfer is 25 BTU/ft3-h-°F

In a certain manufacturing process a certain Liquid gas under 14.7 psia pressure with has a normal boiling point of -183 °C. They decided to be store this in a spherical container with 11.811 inches OD. The system is kept adiabatic by enclosing the container inside another concentric sphere of 0.45 m ID, with intervening space evacuated. Both the sphere surfaces are made of aluminum with e= 0.3. The temperature of the outer sphere is 40°C. To miminized heat gain a polished aluminum with an emissivity of 0.03 was used for container walls. Determine the percentage reduction.choices 81,90% 10.67% 83.12% 39,68% 78.56% 89.75%

Calculate the energy associated with a radiation having wavelength 3000 Å. Give the answer in kcal mol-¹ and also in kJ mol-¹.