A Study on Measurement of Specific Heat of Solid body -Measurement of Heat Conductivity and Warming up of ball-

Abstract

The Science I in Senior High School contains specific heat as apart of subject matter. We think that this is very meaningful for pupils, because pupils will learn one aspects of the history of science and will acquire important concept about heat. In this thesis, we propose the simple and effective method to measure the specific heat and thermal conductivity of metals. And we propose the referencial data for teaching of heat in Secondary School Science. We dealt with balls that are 5 cm in diameter made of cupper, steel, lead, duralumine and ebonite. In these balls, we insert mercury-in-glass thermometer or thermocouple. At first, we sank samples that were in roomtemperature to boiling water until heat equilibrium. Then, we sank these balls to water in room temperature until heat equilibrium. In these two stationary state, we measured temperature in center of balls and calculate heat capacity of each metals from the change of temperature. And we calculate the thermal conductivity through the process of thermal change. The relative error of data that were obtained through these experiments were within 10%. We recognized that the discussions about the heat change of metallic balls are very useful to teach the relations between heat conductivity and heat capacity.