A square thermal window is constructed of two sheets of flat glass, each 4.00 mm thick, separated by 5.00 mm of still air. If the inside of the window is at 20.0°C, the outside at - 30.0°C, and the cross-sectional area of the window is 6.00 m², determine for the steady state: W m. K' k is Thermal conductivity a) The temperatures between the air layer T1 and T2 indicated in the figure. b) The flow of heat through the window. c) If the air layer is removed and the two glass sheets are glued together. What is the new heat current? Is the standing air layer important? And discuss what would happen if the air between the two glasses were not stationary. 4,00 mm 5,00 mm 4,00 mm kglass = 0,80- W m. K Kair = 0,024
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.
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