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.
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Question 7
7.
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Question 8
8.
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Question 9
9.
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Question 13
13.
Latent heat of fusion is the energy needed to change 1Kg of a substance from
Question 14
14.
Latent heat of vaporisation is the energy needed to change 1Kg of a substance from
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.
