AbstractThe experiment centers on thermal expansion and to determine the coefficient of thermal expansions of solids and liquids, two activities were conducted. In the first activity, a linear expansion apparatus was used to get the coefficient of thermal expansion of solids. While the second activity, a pycnometer was used to get the coefficient of thermal expansion of liquids. MethodologyActivity1: Thermal Expansion of SolidsThe initial length of the rod to be tested was measured. It was placed inside the steam jacket and was closed tightly both ends with stopper, leaving out a small portion of each end of the rod for necessary contacts. The steam jacket in the metal frame was mounted. The first cutlet was connected by means of rubber tubing to the boiler. The initial temperature of the rod was measured by inserting a thermometer through the central hole of the jacket. The metal frame was connected to the galvanometer. The micrometer screw was moved so that it just touches the end of the rod as indicated by a sudden movement of the galvanometer needle. The initial reading of the micrometer disc was recorded. The disc was unwind so that the rod can expand freely. The rod was heated for 20 minutes by means of steam coming from the boiler. The final temperature of the rod was recorded. The disc was moved until it is contact again with the rod. The final reading of the disc was then recorded. The coefficient of linear thermal expansion of the rod was computed. The % error was also computed.Activity 2: Apparent Coefficient of Expansion of WaterThe dry pycnometer was weighed and was recorded as W1. It was filled with water. The room temperature was then recorded. The pycnometer with water was heated about 30 Celsius degrees above room temperature. The temperature was recorded as t1. The pyncometer and water was weighed again and was recorded as W2.The pycnometer and water was cooled to room temperature. The pycnometer and water was heated about 50 Celsius degrees above room temperature. This temperature was recorded as t2. The pycnometer with water was weighed at this temperature. The weight was recorded as W3. The coefficient of expansion of water using the formula was computed.