利用冷却法测定金属的比热容  

Measurement of Metal Specific Heat Capacity by Cooling Method

作　　者：孙庆龙[1] 

机构地区：[1]陕西理工学院物理系,陕西汉中723003

出　　处：《实验科学与技术》2012年第2期21-22,共2页Experiment Science and Technology

摘　　要：比热容的测定是物理学的基本测量之一,利用冷却法测定了金属的比热容。基于Matlab软件,根据测量数据拟合出温度随时间的变化关系,并对其求导数,由温度与时间的对应关系得到冷却速率随温度变化的函数。根据同一温度下标准样品和待测样品的冷却速率,得到待测样品的比热容。与公测值相比,百分误差为0.78。The measurement of specific heat capacity is one of the basic measurements in physics,the author determined metal specific heat capacity.Based on Matlab software,one fits the relationship function between time and temperature,and gets its derivation.One also obtains the cooling velocity as a function of temperature by the corresponding relationship between temperature and time.According to the cooling velocity of standard sample and the examining sample at the same temperature,one can get the specific heat capacity of the sample.Compared with the recognized value,the percent error is 0.78.

关 键 词：比热容 冷却法 冷却速率 曲线拟合 

分 类 号：O551.1[理学—热学与物质分子运动论]