enthalpy
复数形式
enthalpies
1
焓, 热含量
a thermodynamic quantity representing the total heat content of a system, commonly denoted as H
- In an exothermic reaction, the enthalpy change (ΔH) is negative, indicating a release of heat to the surroundings.
在放热反应中，焓变（ΔH）为负，表示向周围释放热量。
- The enthalpy of combustion is the heat released when a substance undergoes complete combustion with oxygen.
燃烧的焓是物质与氧气完全燃烧时释放的热量。
- Hess's law states that the total enthalpy change for a reaction is the same, regardless of the multiple steps taken to reach the final products.
赫斯定律指出，无论采取多少步骤达到最终产品，反应的总焓变化是相同的。
- Enthalpy changes in chemical reactions can be determined experimentally using calorimetry, measuring heat flow.
化学反应中的焓变化可以通过量热法实验测定，测量热流。
- Enthalpy plays a role in the analysis of reaction spontaneity, where negative ΔH values often indicate spontaneous processes.
焓在反应自发性的分析中起着作用，负的ΔH值通常表示自发过程。