克劳修斯定理

Clausius theorem

theorem that for a thermodynamic system undergoing a thermodynamic cycle, the following inequality holds: ∮ δ𝑄/𝑇 ≤ 0, where δ𝑄 is heat absorbed by the system and 𝑇 is the temperature

克劳修斯定理也称为克劳修斯不等式，全称克劳修斯积分不等式。是德国科学家鲁道夫·克劳修斯在1855年提出的热力学不等式，描述在热力学循环中，系统热的变化及温度之间的关系：