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热力学体系的量按它们与物质量的关系区分为广度量（容量性质）和强度量（强度性质）两大类，它们是贯穿于化学热力学的两个基本概念。众所周知，体积、内能、焓、熵等是广度量、温度、压力等是强度量，功和热则既不是广度量也不是强度量。热容是物质的一个基本热力学量，是物理化学教学中的一个难点和重点，那么热容是否为状态函数，是广度量还是强度量，国内外教材对此问题看法不一。本文由一例物化习题引出，对这个问题进行粗浅的讨论。
The quantity of thermodynamic system is divided into two categories according to their relationship with the quantity of material, namely, the generalized quantity (capacity property) and the intensity quantity (strength property), which are the two basic concepts that are permeated through chemical thermodynamics. As we all know, volume, internal energy, enthalpy, entropy and so is a wide range of quantities, temperature, pressure and so is the strength of the amount of work and heat is neither a broad measure nor an amount of strength. Heat capacity is a basic thermodynamic quantity of matter, which is a difficult point and key point in physical chemistry teaching. So whether the heat capacity is a state function, whether it is a measure of quantity or strength, the textbooks both at home and abroad have different opinions on this issue. This essay leads from a materialized exercise to discuss the problem in a superficial way.