基础实验试题A:相变材料比热容及相变潜热的测量  

Fundamental test A: Measuring specific heat capacity andlatent heat of phase transform materials

作　　者：薛玉琪 洪思慧 何振辉 XUE Yuqi;HONG Sihui;HE Zhenhui(School of Physics and Astronomy,Sun Yat-Sen University,Zhuhai 519082,China)

机构地区：[1]中山大学物理与天文学院,广东珠海519082

出　　处：《物理实验》2024年第2期32-38,共7页Physics Experimentation

摘　　要：第9届全国大学生物理实验竞赛基础实验试题A为相变材料比热容及相变潜热的测量,本文介绍了实验任务、试题设计及竞赛结果分析.试题包括系统漏热测量、石蜡比热和相变潜热的测量及误差分析3部分.本题重点考查了学生对比热和相变潜热的基本概念、热传递基本方式、能量守恒定律、牛顿冷却定律、外推法修正漏热等知识和方法的灵活运用能力,物理建模的能力,实验方案设计、热电偶测温仪的使用和实验操作等理论联系实际的能力,以及数据处理和误差分析能力.结合调查问卷反馈的分析表明:选手实验操作相对较好,物理建模相对薄弱.The task,the design,the reference solutions and the competition analysis of the fundamental test A(Zhuhai Division)of the 9th Chinese Undergraduate Physics Experiment Competition(CUPEC)were introduced.The experiment tasks included three parts:the measurement of system heat leak,the measurement of specific heat and latent heat of paraffin wax,and the related error analysis.The related contents were emphatically explored,including the flexible application of knowledge and methods such as the basic concepts of specific heat and latent heat,the basic mode of heat transfer,the law of energy conservation,Newton cooling law and the extrapolation correction of heat leak.As well the ability of physical modeling,integrate theory with practice in experimental scheme design,using thermocouple thermometers and experimental operation,data processing and error analysis were evaluated.The analysis based on feedback from the survey questionnaire indicated that the ability of the experimental operations of the contestants was relatively good,while that of the physical modeling was relatively weak.

关 键 词：相变 潜热 比热 漏热 物理建模 

分 类 号：O551.3[理学—热学与物质分子运动论]