P2 - Energy transfer by heating
- Created by: izz08
- Created on: 08-11-17 18:14
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- P2 - Energy transfer by conduction
- Energy transfer by conduction
- Metals are the best conductors of thermal energy
- Non-metal materials, such as wool and fiberglass, are the best insulators of thermal energy
- The higher the thermal conductivity of a material l, the higher the rate of energy transfer through the material
- A thick layer of insulating material will have a low rate of energy transfer through it
- Specific heat capacity
- The specific heat capacity of a substance is the amount of energy needed to change the temperature of 1 kg of the substance by 1 degrees Celsius
- The greater the mass of an object, the more slowly its temperature increases when it is heated
- Heating and insulating buildings
- Houses are heated by electric or gas heaters, oil or gas central heating systems, or by solid fuel in stoves or fireplaces
- The rate of energy transfer from houses can be reduced by using a loft insulation, cavity, wall insulation,double-glazed windows, aluminium foil behind radiators, and having external walls built with thicker bricks that have lower thermal conductivity
- Cavity wall insulation is insulation used to fill the cavity between the two brick layers of an external house wall
- Energy transfer by conduction
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