One aspect clothing manufacturers need to consider is the thermal insulation of the clothing they produce. In order to measure this, they have come up with their own unit of thermal insulation appropriately called the 'clo'. The 'clo' has the same dimensions as R values used to describe the thermal insulation of buildings. 1 clo = 0.155 K m² W-1 Part 1) Typical winter skirts have a thermal insulation of 0.23 clo, and a thickness of 0.30 mm. What is the thermal conductivity k for winter skirts? k = W m-' K-1 Part 2) The material making up these skirts is tested on a mannequin. The mannequin has a body surface area of 2.21 m². In a room at 9.67 °C what is the rate of heat loss if the mannequin is kept at 37.0 °C? W Part 3) How much energy would need to be supplied to the mannequin to keep it at 37.0 °C? for 1.0 hours in this room? J
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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