A cooling curve for a certain mass of molten candle wax is given below - Junior Cycle Science - Question b - 2006
Question b
A cooling curve for a certain mass of molten candle wax is given below.
(i) Why is the temperature on the g... show full transcript
Worked Solution & Example Answer:A cooling curve for a certain mass of molten candle wax is given below - Junior Cycle Science - Question b - 2006
Step 1
Why is the temperature on the graph constant between A and B?
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Answer
The temperature remains constant between points A and B because the candle wax is undergoing a phase change from solid to liquid, which involves latent heat. During this process, the heat energy being supplied to the wax is used to change its state rather than increasing its temperature.
Step 2
Use the graph to find the melting point of candle wax.
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Answer
The melting point of the candle wax is found by observing the temperature where the wax transitions from solid to liquid on the cooling curve. According to the graph, this occurs at 42 °C.
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