In the experiment, “Freezing and Melting of Water,” you saw that the temperature of pure water remained constant at its freezing temperature as it froze and melted. Using a computer-interfaced Temperature Probe, you will now observe what happens when a different pure substance, phenyl salicylate, freezes. Using a second Temperature Probe and sample, you will also see the effect on freezing temperature when a small amount of another substance, benzoic acid, is dissolved in the phenyl salicylate.
In this experiment, you will
- Observe what happens when phenyl salicylate freezes.
- See the effect on the freezing temperature when a small amount of benzoic acid is dissolved in the phenyl salicylate.