A thin metal plate is insulated on its rear face, and its front face is exposed to solar radiation. The exposed surface of the sheet has 0.8 absorbance, for solar radiation. If this radiation falls on the plate with a power of 450 W/m², and the temperature of the air surrounding it is 25 °C, determine the temperature T, of the plate, when the heat loss by convection is equal to the energy solar absorbed by the plate. Assume that the convective heat transfer coefficient is h=50 W/m². "C, and neglect heat loss by radiation. a=0.8 25°C 450W/m2
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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