混合溶液等压比热容的简便测量系统及修正

摘要

The heat capacity of liquid is one of the key parameter that can reflect the characteristic;it is the basis of understanding and using of liquid.The heat capacity of the pure liquid can be obtained by querying, while it generally obtained by measuring for the mixed liquid.Based on the property that the kettle can preserve heat,this paper designed a system to measure the heat capacity of mixed solution by using electro-thermal method.The correction value of this system is obtained by the analysis of the temperature in the experiment. Thus,the heat capacities of salt solution in different concentration are measured.%液体比热容是反映液体特性的重要参量之一，是了解和利用液体的依据。纯净液体的比热容可通过查询获得，而混合溶液的比热容基本需要通过测量获得。本文利用水壶的保温特性，设计了一种可利用电加热法测量混合溶液等压比热容的系统，并通过分析实验中的温度变化获得了本测量系统的修正值，最后利用该系统测量了不同浓度盐溶液的等压比热容。