Gibbs Free Energy | 吉布斯自由能

📚 Gibbs Free Energy | 吉布斯自由能

Gibbs free energy links enthalpy, entropy and temperature to predict the thermodynamic feasibility of a chemical process at constant pressure and temperature.

吉布斯自由能将焓、熵和温度联系起来，用于预测恒压恒温下化学过程的热力学可行性。

At A-Level, you must be able to use ΔG = ΔH − TΔS, interpret the sign of ΔG, and connect standard Gibbs free energy changes to equilibrium constants and electrode potentials.

在 A-Level 考试中，你需要会使用 ΔG = ΔH − TΔS、解释 ΔG 的正负，并把标准吉布斯自由能变与平衡常数和电极电势联系起来。

1. Introduction to Gibbs Free Energy | 吉布斯自由能简介

Gibbs free energy, G, is a thermodynamic state function defined as G = H − TS, where H is enthalpy, T is absolute temperature, and S is entropy.

吉布斯自由能 G 是一个热力学状态函数，定义为 G = H − TS，其中 H 为焓，T 为热力学温度，S 为熵。

For a chemical reaction, the change in Gibbs free energy is ΔG = ΔH − TΔS at constant temperature and pressure. The sign of ΔG tells us whether a reaction is thermodynamically feasible.

对于化学反应，在恒温恒压条件下，吉布斯自由能变 ΔG = ΔH − TΔS。ΔG 的正负可以判断反应是否热力学可行。

Gibbs free energy is measured in kilojoules per mole (kJ

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