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依据热力学第一定律,针对热机循环效率,讨论如何判断理想气体准静态微过程中的吸热和放热。提出吸放热转折点的概念,给出吸热Q_1和放热Q_2的计算公式。
According to the first law of thermodynamics, we discuss how to judge the endothermic and exothermic of the ideal gas in the quasi-static microscopic process according to the heat engine cycle efficiency. The concept of heat absorption and exothermic transition point is put forward, and the formula of heat absorption Q 1 and heat release Q 2 are given.