A carpenter builds a solid wood door with dimensions 2.00 m ×0.95 m × 5.0 cm. Its thermal conductivity is k = 0.120 W/(m⋅K). The air films on the inner and outer surfaces of the door have the same combined thermal resistance as an additional 2.1 cm thickness of solid wood. The inside air temperature is 15.0 ∘C, and the outside air temperature is -8.0 ∘C. What is the rate of heat flow through the door? By what factor is the heat flow increased if a window 0.550 m on a side is inserted in the door? The glass is 0.500 cm, and the glass has a thermal conductivity of 0.80 W/(m⋅K). The air films on the two sides of the glass have a total thermal resistance that is the same as an additional 12.0 cm of glass.
Energy transfer
The flow of energy from one region to another region is referred to as energy transfer. Since energy is quantitative; it must be transferred to a body or a material to work or to heat the system.
Molar Specific Heat
Heat capacity is the amount of heat energy absorbed or released by a chemical substance per the change in temperature of that substance. The change in heat is also called enthalpy. The SI unit of heat capacity is Joules per Kelvin, which is (J K-1)
Thermal Properties of Matter
Thermal energy is described as one of the form of heat energy which flows from one body of higher temperature to the other with the lower temperature when these two bodies are placed in contact to each other. Heat is described as the form of energy which is transferred between the two systems or in between the systems and their surrounding by the virtue of difference in temperature. Calorimetry is that branch of science which helps in measuring the changes which are taking place in the heat energy of a given body.
A carpenter builds a solid wood door with dimensions 2.00 m ×0.95 m × 5.0 cm. Its thermal
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