【摘要】 从居里外斯定律出发,根据热力学第一定律和热力学第二定律,研究了磁性体的内能和定磁热容量的特性,计算了以磁性体为工质的可逆卡诺热机的效率,讨论了卡诺热机工作的条件.结果表明:系统的定磁热容量只是温度的单值函数,但是一般磁性体的内能不仅仅随温度变化.卡诺循环的效率只取决于热源和冷源的温度,符合卡诺定理的推论.更多还原

【Abstract】 On the basis of the Curie-Weiss law,according to the first and second law of thermodynamics,the characters of internal energy and heat capacity with fixed magnetization are investigated.A derivation of the efficiency of reversible Carnot thermomotor for magnetic matter used as working substance is completed,which conditions are discussed.The educed results are as follows.The heat capacity with fixed magnetization is single function of temperature,but commonly internal energy is not.The efficiency of Carnot cycle is merely lie on the temperatures of cold and heatt bath,which is conformable to the infer of Carnot theorem.更多还原