The graph shown alongside shows how the temperature of a pure substance changes as it is heated (click to enlarge)
At what temperature does the substance melt? ................
Question 4
4.
Label the section of the graph with a letter X where the substance is a liquid only and with a letter Y where it exists as both a liquid and solid at the same time.
Question 5
5.
If the heater provides 100J of heat energy every second use the graph to calculate the energy required to melt this substance
Question 6
6.
If 1.5 kg of the substance was used, use your answer to Q5 to calculate the specific latent heat of fusion for this substance.
1
Question 7
7.
1
Question 8
8.
1
Question 9
9.
1
1
1
Question 13
13.
Question 14
14.
Question 15
15.
An electric kettle produces 2000 J of energy each second. It is filled with water, weighed and switched on. After coming to the boil, it is left on for a further 120 seconds and is then switched off. It is found to be 90 g lighter. Calculate the specific latent heat of vaporisation from this data.
The melting point of lead is 327oC
The boiling point of lead is 1774oC
The melting point of Oxygen is -219oC
The boiling point of Oxygen is-183oC
At - 200 °C what state will the oxygen be in?
Solid
Liquid
Gas
The melting point of lead is 327oC
The boiling point of lead is 1774oC
The melting point of Oxygen is -219oC
The boiling point of Oxygen is-183oC
At -450 °C what state will the lead be in?
Solid
Liquid
Gas
Question 10
10.
Question 11
11.
Question 12
12.
Latent heat of fusion is the energy needed to change 1Kg of a substance from
liquid to gas
solid to gas
Solid to liquid
Latent heat of vaporisation is the energy needed to change 1Kg of a substance from
