Cooling and Heating Curves
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A series of free IGCSE Chemistry Activities and Experiments (Cambridge IGCSE Chemistry).
In this experiment, you are going to plot cooling and heating curves for stearic acid.
Method:
- Obtain a test tube with melted stearic acid in it. Stearic acid is a waxy substance similar to candles.
- Place the test tube in a beaker of hot water to melt the stearic acid.
- Record the temperature as soon as you remove it from the hot water, and continue recording the temperature every minute until all is solidified.
- You may keep the test tube at your desk until the temperature has come down the room temperature, which is approximately 23 degrees Celsius.
- Plot a graph for the set of readings, with time on the x-axis and temperature on the y-axis.
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