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Lauric acid is the main fatty acid in coconut oil and is currently being studied for potential health benefits. This white, powdery substance remains solid at room temperature (23°C).  To investigate the physical properties of lauric acid, students added 15 g of lauric acid and 15 g of water to a test tube and placed it in a 60°C water bath (see Figure 1) to melt the sample.  

Figure 1

Part A

When the test tube registered 60°C, the students removed the test tube from the heated beaker and placed it in a second water bath that was 23°C (see Figure 1). They recorded the temperature of the sample every 20 seconds until the sample solidified. Results are shown in Figure 2.

Figure 2

Part B

When the lauric acid sample reached 38°C, the students removed it from the 30°C water bath and placed it back in the 60°C bath. They recorded the temperature every 20 seconds for 400 seconds.   The results are shown in Figure 3. 

Figure 3

Choose the option that best answers the question.

Which of the following conclusions is best supported by the experiment?


Lauric Acid

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