In this lab, we learned how to properly collect data during the freezing and melting of water, and how to analyze graphs of the freezing and melting points. The freezing and melting points of a substance are opposites of each other. The temperature at which a liquid changes into a solid is the freezing point, and the temperature at which a solid changes into a liquid is called the melting point. You can see the melting and freezing points on graphs. These graphs will have either a heating or cooling curve.A heating curve goes up in temperature, so it starts in the bottom left corner of a graph and up towards the top right part. A cooling curve does it the opposite. It decreases in temperature, which means it starts at the top left corner of the graph and moves downward to the bottom right corner. There is also a difference between kinetic and potential energy. Potential energy is the energy stored up in something, while kinetic energy is the amount of energy something has due to motion. A colligative property is any property that depends on how many particles are in a solution, and not on what kind they are. There are also differences between physical and chemical changes. A physical change only alters the form of something, but not the make-up of it. A chemical change changes the composition of something.






Our results do support the theoretical model for heating and cooling curves. Our heating curve increases in temperature and follows the type of line it should be. Same goes for the cooling curve. There was a decrease in temperature and it followed the type of line. Logger Pro helped tremendously with this lab. It was easy to collect the temperatures, and also easy to graph them. Logger Pro made it simpler to find out the exact melting and freezing points. It's a great tool to have for this experiment.