When a substance is heated, what do particles gain?
Kinetic energy
2 of 22
What is temperature a measure of?
The average kinetic energy of particles in a substance
3 of 22
Where does energy flow from and to?
From hot objects to cooler ones 'if theres a difference in temp between 2 places then energy will flow between them'. Greater difference = faster rate of cooling
4 of 22
What does specific heat capacity do and what is it?
Tells you how much energy stuff can store. It is the amount of energy needed to raise the temp of 1kg of a substance by 1 degree
5 of 22
What is the equation using specific heat capacity?
Energy = Mass X Specific Heat Capacity X Temperature Change
6 of 22
What are the flat parts on a heating graph? (see pg 11 if confused)
Boiling and melting
7 of 22
What are the flat parts on a cooling graph? (see pg 11 if confused)
Condesing and freezing
8 of 22
What is the specific latent heat of boiling?
The energy needed to boil 1kg of material without changing its temperature.
9 of 22
What is the specific latent heat of melting?
The amount of energy needed to melt 1kg of material without changing its temperature
10 of 22
Specific latent heat equation?
Energy = Mass X Specific Latent Heat
11 of 22
Where does conduction ocur?
Mainly in solids
12 of 22
Definition of conduction?
Conduction of heat is the process where vibrating particles pass on extra kinetic energy to neighbouring particles
13 of 22
Where does convection occur?
Only liquids and gases
14 of 22
Definition of convection?
Convection occurs when the more energetic particles move from teh hotter region to the cooler region - and take their heat energy with them
15 of 22
What do radiators rely on?
Convection currents
16 of 22
How do we get heat from the sun?
Through radiation
17 of 22
Does radiation need a medium to travel through?
No. It can occur in a vaccum
18 of 22
Do all objects emit and absorb heat radiation?
Yes
19 of 22
What surfaces are good for absorbing and emitting radiation?
Matt black
20 of 22
What surfaces are bad for absorbing and emitting radiation?
Light smooth shiny
21 of 22
Why is heat radiation important in cooking?
Food is heated on the surface by radiation and then passed through by conduction or convection
22 of 22
Other cards in this set
Card 2
Front
When a substance is heated, what do particles gain?
Back
Kinetic energy
Card 3
Front
What is temperature a measure of?
Back
Card 4
Front
Where does energy flow from and to?
Back
Card 5
Front
What does specific heat capacity do and what is it?
Comments
No comments have yet been made