Imagine a person standing naked in a room at 19.1°C. The walls are well insulated, so they also are at 19.1°C. The person’s surface area is 2.20 m2, and his basal metabolic rate is 2167 kcal/day. His emissivity is 0.970. If the person’s skin temperature were 38.2°C (the same as the internal body temperature), at what net rate would heat be lost through radiation? (Ignore losses by conduction and convection.)
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.
Imagine a person standing naked in a room at 19.1°C. The walls are well insulated, so they also are at 19.1°C. The person’s surface area is 2.20 m2, and his basal
If the person’s skin temperature were 38.2°C (the same as the internal body temperature), at what net rate would heat be lost through
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