Introduction: Matter is composed of molecules that are in constant motion. When these molecules gain enough energy to overcome the attraction between the molecules, a phase change occurs. When gas molecules begin to bubble in a liquid, we say that the liquid is boiling. Cooling the liquid causes the molecules to move more slowly and rearrange themselves to form solids. Based on the movement of molecules and the temperature, matter changes from solid to liquid to gas or the reverse.

Purpose:
To prepare a heating curve for water, and use this graph to determine the melting point and boiling point for water.

Materials and Equipment:
400 mL Beaker, Hot Plate, Stirring Rod, Ice, Buret Clamp, Thermometer, Stopwatch, Graph Paper

Your download will include a lab that is ready to be copied and passed out to your students. It will include Title, Purpose, Introduction, Safety Precautions, Procedure, Data Tables, and Follow Up questions. You can choose to have your students write their own lab report or you can have them use the included Student Data Pages.

All answers are included.

This download will include both an editable Word document and a pdf form of the lab.

© Amy Brown – Science Stuff