Ch2 Energy transfer by heating

Question 1

thermal energy

Answer 1

mc ∆ θ

Question 2

specific heat capacity

Answer 2

the amount of energy required to raise the temperature of 1kg of the substance
by 1 degree Celsius

Question 3

Reducing energy transfer

Answer 3

high thickness of a material

low thermal conductivity

Question 4

5 ways of reducing energy transfer at a house

Answer 4

1. loft insulation such as fibreglass
   - air between fibres reduce it by conduction
2. cavity wall insulation
   - space between two layers of bricks
   - traps air in small pockets
3. aluminium foil between radiator and wall
   - reflects energy away
4. double-glazed windows
   - dry air between the panes is a good insulator
   - vacuum between panes prevents energy transfer
5. thicker bricks with lower thermal conductivity