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Kinetic theory
The Kinetic theory describes the rate of movement in particles. Substances can exist in three states of matter ­ Solid,
Liquid and Gas ­ in each state the arrangement of particles is different.
SOLIDS: strong forces of attraction hold particles a fixed, regular arrangement giving solid a definite…

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temperature, but the metal part conducts heat away from your hand more quickly.
Convection occurs when the more energetic particles move from the hotter to the cooler region and take their
energy with them.
Occurs in fluids (gases and liquids) due to the internal circulation of particles; it can't happen…

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2) Particles near the heat source get more energy and start moving faster, meaning that there's more distance
between them i.e. the
water expands and becomes less dense. (Note that if there is water below the heat source, it will get hardly any
heat by conduction) 3) The reduction in…

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forces evaporation.
Rates of Heat Energy Transfer:
Factors that affect heat energy transfer:
· Surface area ­ bigger the surface area more IR radiation waves can be emitted/absorbed to/from the surface to the
faster the heat transfer. (Radiators have a large surface area and cars and motorbikes have fins so…

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There are many things that you can do to a building to reduce the amount of heat that escapes. Some are more
efficient and some are more cost effective.
Cost Effective are the methods which are the cheapest; they have the shortest payback time and cover the amount
you pay…

Page 9

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years Hot Water Tank Jacket £15 £30 6 months
Double Glazing £3000 £60 50 years Draught Proofing £100 £50 2 years

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Pages in this set

Page 1

Preview of page 1

Page 2

Preview of page 2
Kinetic theory
The Kinetic theory describes the rate of movement in particles. Substances can exist in three states of matter ­ Solid,
Liquid and Gas ­ in each state the arrangement of particles is different.
SOLIDS: strong forces of attraction hold particles a fixed, regular arrangement giving solid a definite…

Page 3

Preview of page 3
temperature, but the metal part conducts heat away from your hand more quickly.
Convection occurs when the more energetic particles move from the hotter to the cooler region and take their
energy with them.
Occurs in fluids (gases and liquids) due to the internal circulation of particles; it can't happen…

Page 4

Preview of page 4

Page 5

Preview of page 5
2) Particles near the heat source get more energy and start moving faster, meaning that there's more distance
between them i.e. the
water expands and becomes less dense. (Note that if there is water below the heat source, it will get hardly any
heat by conduction) 3) The reduction in…

Page 6

Preview of page 6
forces evaporation.
Rates of Heat Energy Transfer:
Factors that affect heat energy transfer:
· Surface area ­ bigger the surface area more IR radiation waves can be emitted/absorbed to/from the surface to the
faster the heat transfer. (Radiators have a large surface area and cars and motorbikes have fins so…

Page 7

Preview of page 7

Page 8

Preview of page 8
There are many things that you can do to a building to reduce the amount of heat that escapes. Some are more
efficient and some are more cost effective.
Cost Effective are the methods which are the cheapest; they have the shortest payback time and cover the amount
you pay…

Page 9

Preview of page 9
years Hot Water Tank Jacket £15 £30 6 months
Double Glazing £3000 £60 50 years Draught Proofing £100 £50 2 years

Page 10

Preview of page 10

Comments

No comments have yet been made