Quantitative Thermal Conductivity

The first picture show that the data of the lab. The second picture show how to do the lab. We use 289 W immersion heaters to put in the 200 ml cold water which initial temperature is 30.4 Celsius Degree. Then, start heating the water. The final temperature is 36.2 Celsius Degree. From the fist picture, we can know that it has relationship between the heat and the temperature. It is a linear, and the slope is 0.8372 joules per Celsius degree. The third picture is calculation of the heat. The formula is dQ/dt = [k*A*(Tf -Ti)]/L. k called the thermal conductivity, and it depend on the substance. In the lab, we use Aluminum to calculate. A is the area, and L is length. Therefore, the heat has a relationship with the substance, area, temperature, and length. In addition, the area is large, the changing temperature is increase, and the length is decrease, so the heat will be large.