1. Energy changes - Heating ICe
12/01/2019
Objective
To record and interpret the temperature of water during melting and boiling.
The specific latent heat of a substance is the energy required per kilogram to change its state without any change in temperature.

2. Energy = mass x specific latent heat
12/01/2019
The specific latent heat of a substance is the energy required per kilogram to change its state without any change in temperature.
Energy measure in Joules, Mass in kg and SLH in J/kg
SLH of fusion is for melting.
SLH of vaporisation is for boiling.
Energy = mass x specific latent heat

3. Equipment & Method Equipment Method Ice Beaker Thermometer
Bunsen Burner
Stopwatch
Tripod
Gauze
Heatproof Mat

4. Specific latent heat questions
Specific latent heat of water is J/kg .
1. Calculate the quantity of heat energy required to:
convert 2 kg of water at 100 oC into steam
convert 3kg of ice into water at 0 oC.
2. Calculate the mass of water that can be converted into steam using 100,000J of energy

5. Energy changes
Time (Secs)
Temperature (degrees Celsius)

7. Changes of State Temperature Boiling  Condensing  Melting 
Gas
Liquid  Gas
Liquid
Melting 
Freezing
Solid  Liquid
Solid
Time

8. Solids, Liquids and Gases - Density
Solid Liquid Gas
When a substance is changing state the energy goes into
Otherwise the energy goes into