Freezing and Melting of Water

Date: November 20, 2012
Title: Freezing and Melting Points of Water
Materials used: Computer, Vernier Computer Interface, Logger Pro, Temperature Probe, Ring Stand, Utility Clamp, Test Tube, 400 mL Beaker, Water, 10mL Graduated Cylinder, Ice, Salt, Stirring Rod.

In class today, we learned about the melting and freezing point of water. After listening to the teacher, we were left with a piece of paper for directions. My group (which consist of Patrick, Elizabeth, and Stephen. They are close friends of mine.) read the paragraph and began to perform the experiment.

Procedures: First, plug in the cord that comes with the Interface into the computer and open Logger Pro. Fill the beaker with 100mL of water and fill about ⅓ of the beaker with ice. Take the test tube and put the Temperature Probe in it. Put a little bit of water in it, about 5mL of water, into the test tube. Then, put about 5 TBS of salt into the beaker. Then, use the Rod and stir the salt until it dissolves. Then, put the test tube in. Start the test. Move around the test tube for about 10 minutes. Then, stop the test. Now, let the ice melt in the test tube and dump out the old water of the beaker. Put warm water into the beaker. Put the test tube and and begin recording the data.

Now, after we did this, we have a lot of info. First off, we learned that when water freezes it loses it kinetic energy and when it’s heated it gains this energy. We have our pictures of data below.