【摘要】 从应用型实验出发,基于电热法的基本原理,自行设计、加工并组装一台改进的比热容测定仪,最后测定了固体物质氯化钠粉末的比热容。与传统量热器相比,单独设计并加装了一根样品管,拓宽了待测样品的范围;将待测弱导热性固体氯化钠样品和导热性较好的锌粉预混合,使待测氯化钠样品各部分温度分布均匀,得到了较为准确的比热容数值0.86 J/(g·K)。通过该实验,有助于学生对比热容有一个初步的认识,提高学生设计和组装实验装置的实践能力。更多还原

【Abstract】 This experiment embarked from the reality, based on electro-thermal method, an improved device for heat capacity was designed, processed and assembled. Compared to traditional calorimeter, a copper sample tube was designed and installed in an inner cylinder, which broaden the scope of the sample. The weak thermal conductivity solid sodium chloride(NaCl) sample was mixed with good thermal conductivity zinc before testing, which made the temperature distribution of the NaCl sample more uniform than pure NaCl. The heat capacity of NaCl was tested to be 0.86 J/(g·K). According to this experiment, it helps the students to achieve a preliminary understanding of heat capacity, and raise their practical ability in designing and assembling experimental device.更多还原