面向超临界流体的物理化学(热力学)教学案例设计与实践

Teaching Case Design and Practice of Physical Chemistry Thermodynamics in the Field of Supercritical Fluids

摘要: 物理化学中热力学部分是化学、化工及相关专业的核心基础知识，但其理论抽象、公式繁多，学生常感到枯燥难懂，难以建立理论与实际应用的联系。为解决这一问题，本文以“超临界流体”这一前沿且应用广泛的领域作为教学案例，进行了精心的设计与教学实践。案例将热力学基本概念(如相图、临界点、偏摩尔量、逸度、化学势等)融入超临界CO₂萃取技术的具体情境中，通过“问题驱动–理论探究–应用实践–前沿拓展”的教学模式，旨在激发学生学习兴趣，深化对热力学原理的理解，并培养其解决复杂工程问题的能力和创新思维。教学实践表明，该案例能有效提升教学效果，实现知识、能力与素质的有机融合。

Abstract: The thermodynamics in Physical chemistry is a core fundamental knowledge for chemistry, chemical engineering, and related majors. However, its theoretical abstractness and numerous formulas often make students find it’s difficult to understand, struggling to establish the connection between theory and practical application. To address this issue, this paper takes “supercritical fluid”—a cutting-edge and widely applied field—as a teaching case, presenting its careful design and teaching practice. The case integrates fundamental thermodynamic concepts (such as phase diagrams, critical point, partial molar quantities, fugacity, chemical potential, etc.) into the specific context of supercritical CO₂ extraction technology. Adopting a “problem-driven → theoretical inquiry → application Practice → frontier expansion” teaching model, it aims to stimulate students’ interest in learning, deepen their understanding of thermodynamic principles, and cultivate their ability to solve complex engineering problems and innovative thinking. Teaching practice shows that this case can effectively enhance teaching outcomes, achieving the organic integration of knowledge, ability, and quality.