Consider the rate of heat conduction through a double-paned window that has a 1.4-m2 area and is made of two panes of 0.745-cm-thick glass separated by a 0.95-cm air gap. You can ignore the increased heat transfer in the air gap due to convection. Part (a) Calculate the rate of heat conduction through this window, in watts, given that the inside surface temperature is 15.0°C, while the outside temperature is -10.0°C. Make the assumption that the temperature differences across the two glass planes are equal. First find these and then the temperature drop across the air gap. Part (b) For comparison, calculate the rate of heat conduction, in watts, through a single 1.52-cm-thick window of the same area and with the same temperatures as in part (a).
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.
Problem 10: Consider the rate of heat
Part (a) Calculate the rate of heat conduction through this window, in watts, given that the inside surface temperature is 15.0°C, while the outside temperature is -10.0°C. Make the assumption that the temperature differences across the two glass planes are equal. First find these and then the temperature drop across the air gap.
Part (b) For comparison, calculate the rate of heat conduction, in watts, through a single 1.52-cm-thick window of the same area and with the same temperatures as in part (a).
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