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Georgia [21]
4 years ago
8

Draw a cooling graph of water as it passes from 20°c to –20°c

Chemistry
1 answer:
tatyana61 [14]4 years ago
3 0
The graph will begin at 20 °C and have temperature on the y-axis and time on the x-axis. The line will be a downwards sloping one, until the value of temperature of the graph reaches 0 °C. There, it will become horizontal for a small amount of time, and then continue to slope downwards until the graph reaches -20 <span>°C.

The horizontal region is where the freezing of water will take place, and there is no temperature change that occurs when a state change is taking place. This is because the energy involved then is latent energy.</span>
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