冷却法测量金属比热容实验的分析与研究  

Analysis and Research for the Experiment Measuring Metal Specific Heat Capacity by Cooling Method

作　　者：胡君辉[1] 李丹[1] 唐玉梅[1] 唐妍梅[1] 

机构地区：[1]广西师范大学物理科学与技术学院,广西桂林541004

出　　处：《实验科学与技术》2011年第3期3-5,114,共4页Experiment Science and Technology

基　　金：2008年国家级实验教学示范中心建设单位项目资助;广西师范大学教育教学改革与建设项目资助;广西师范大学2009年教育教学软件立项项目资助

摘　　要：基于牛顿冷却定律的冷却法测量金属比热容实验是普通物理实验中一个重要的热学实验,实际实验中由于计时误差较大,使得实验测量精度不高,文中对两种实验操作方案的合理性进行了分析,定量研究了实验室温和不同测温范围对实验结果的影响,结果表明实验室室温对实验影响较小,不同测温范围对该实验的影响明显,并对实验的改进,测量精确度的提高,教学效果的改善作了探讨。The experiment measuring metal specific heat capacity by cooling method,which is based on Newton＇s law of cooling,is an important thermal experiment in general physics experiment,but the experimental accuracy is low due to the big error of timing in the real experiment.In this paper,analysis of reliability is conducted for two different operation schemes of experiment,the influence of laboratory temperature and different temperature measurement range on the experiment are researched quantitatively.The results show that the influence on the experiment is negligible by laboratory temperature and is obvious by different temperature measurement range,and the discussion for improving on the experiment,measurement accuracy and teaching effect are presented.

关 键 词：比热容 牛顿冷却定律 测温范围 同步计时 

分 类 号：TK311[动力工程及工程热物理—热能工程]