A closed box is filled with dry ice at a temperature of -77.6 °C, while the outside temperature is 21.8 ° C. The box is cubical, measuring 0.33 m on aside, and the thickness of the walls is 0.072 m. In 1 hour 620,000 J of heat is conducted through the six walls. Find the thermal conductivity of the material of the box. k = J/(s*g*° C) %3D

A closed box is filled with dry ice at a temperature of -77.6 °C, while the outside temperature is 21.8 ° C. The box is cubical, measuring 0.33 m on aside, and the thickness of the walls is 0.072 m. In 1 hour 620,000 J of heat is conducted through the six walls. Find the thermal conductivity of the material of the box. k = J/(sg° C) %3D

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter17: Energy In Thermal Processes: The First Law Of Thermodynamics

Section: Chapter Questions

Problem 9OQ

See similar textbooks

Similar questions

At 25.0 m below the surface of the sea, where the temperature is 5.00C, a diver exhales an air bubble having a volume of 1.00 cm3. If the surface temperature of the sea is 20.0C, what is the volume of the bubble just before it breaks the surface?
A brass rod (Y=90109N/m2), with a diameter of 0.800 cm and a length of 1.20 m when the temperature is 25 , is fixed at both ends. At what temperature is the force in it at 36,000 N?
During heavy exercise, the body pumps 2.00 L of blood per minute to the surface, where it is cooled by 2.00C. What is the rate of heat transfer from this forced convection alone, assuming blood has the same specific heat as water and its density is 1050kg/m3 ?
For the human body, what is the rate of heat transfer by conduction through the body's tissue with the following conditions: the tissue thickness is 3.00 cm, the difference in temperature is 2.00 , and the skin area is 1.50 m2. How does this compare with the average heat transfer rate to the body resulting from an energy intake of about 2400 kcal per day? (No exercise is included.)
Two concrete spans that form a bridge of length L are placed end to end so that no room is allowed for expansion (Fig. P16.63a). If a temperature increase of T occurs, what is the height y to which the spans rise when they buckle (Fig. P16.63b)?
Long aluminum wires of diameter 5 mm (r = 2702 kg/m3 and cp = 0.896 kJ/kg·°C) are extruded at a temperature of 350°C and are cooled to 50°C in atmospheric air at 25°C. If the wire is extruded at a velocity of 8 m/min, determine the rate of heat transfer from the wire to the extrusion room.
A glass window in a house has an area of 0.67 m^2 and a thickness of 2.4 mm. The temperature inside the house is 21 C, and the outside temperature is 0 C. How much heat is lost through the window in 1 hour (3600 s) due to conduction? Use 1.0 W/(m x C) for the thermal conductivity of the glass. How much heat is lsot through the window in 1 hour (3600 s) due to raditaion? ( assume the temperature of the rntire glass is 21 C for this probelem). Which mode of heat transfer (condutciton vs. raditiaon) accounts for the greater amount of heat loss?
What is the initial temperature of a 2.0 kg piece of aluminum (c = 910 J / kg 0 C) which must accumulate 2.5 x 10 5 J of heat to reach a final temperature of 170 degrees C?
If I have an unknown substance of mass m=2.54kg which requires Q= 3430J of heat to change its temperature by ten degrees Kelvin, what is this substances specific heat?
A completely sealed container, in the shape of a cube with side panels of length = 0.69 m, is full of carbonic ice at temperature -103.1 °C and placed in a room where the ambient temperature is 36.7 °C. The thickness of each (identical) panel of the container is 5.4 cm. In 1.6 days (s), an amount of 3383899 J of heat is conducted through the panels. Find the thermal conductivity of the material which the panels are made of.
A solid concrete wall has dimensions 4.0 m × 2.4 m and is 30 cm thick. The thermal conductivity of the concrete is 1.3 W/m ∙ K, and it separates a basement from the ground outside. The inner surface of the wall is at 18°C, and the outside surface is at 6°C. How much heat flows through the wall every hour?
Consider a 20 cm thick granite wall with a thermal conductivity of 2.79 W/m·K. The temperature of the left surface is held constant at 50°C, whereas the right face is exposed to a flow of 22°C air with a convection heat transfer coefficient of 15 W/m2·K. Neglecting heat transfer by radiation, find the right wall surface temperature and the heat flux through the wall.