理想气体多方过程的比热及其基本特征THE SPECIFIC HEAT AND BASIC CHARACTERISTIC OF THE POLYTROPIC PROCESS OF IDEAL GASES
苏山河,赵英汝,陈金灿
摘要(Abstract):
根据理想气体多方过程方程中的多方指数为常数的特性,阐明多方过程的比热密切依赖于理想气体的等容比热。当理想气体等容比热为常数时,比热为常数的热力学过程均为多方过程,多方指数的取值没有禁区。当理想气体的等容比热是温度的函数时,比热为常数的热力学过程不是多方过程,如比热为零的绝热过程不是多方过程,多方指数的取值有禁区。仅当热力学过程的比热表示式类似于等容比热表示式且具有相同的温度函数时,该热力学过程才是理想气体的多方过程。理想气体多方过程的基本特征是过程比热与等容比热之差为常数。
关键词(KeyWords): 多方过程;比热;等容比热;温度;理想气体
基金项目(Foundation): 福建省高校物理学学科联盟教育教学改革研究项目(FJPHYS-2023-A02)资助
作者(Author): 苏山河,赵英汝,陈金灿
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