标题: What is the minimum to say the activation energy of a reaction is high ? [打印本页] 作者Author: vitalys 时间: 2022-5-1 01:21 标题: What is the minimum to say the activation energy of a reaction is high ? I often encounter the term "high activation energy" in a published articles, but i have some confusion about the term. To say high or low, is compared to something else, but for a chemical reaction, is there some rule or principle in chemistry that allow us to say high or low activation energy ? 作者Author: sobereva 时间: 2022-5-1 15:41
Whether the activation energy is high or low is usually in terms of whether the reaction is easy to proceed. The ease of a reaction is directly related to reaction temperature. Assuming that a reaction is carried out at room temperature, it is almost impossible to proceed if its activation energy reaches several tens of kcal/mol, so it can be said that such an activation energy is high; because at room temperature a reaction with an activation energy less than 21 kcal/mol is easy to proceed (see http://sobereva.com/506), one can say such an activation energy is low.