反应热ΔH的大小比较是高考考查反应热的常见题型,也是高中化学学习的重点。现归纳总结如下:一、根据反应物的本性比较等物质的量的不同物质与同一种物质反应时,因性质不同,其反应热也不同,如等物质的量的同一主族的不同金属或非金属与同一种物质反应,金属或非金属越活泼反应就 The magnitude of the heat of reaction, ΔH, is a common type of reaction heat test in college entrance examinations and is also the focus of high school chemistry study. Now summarized as follows: First, according to the nature of the reactant compared to the amount of different substances react with the same substance, due to different properties, the heat of reaction is also different, such as the amount of substances in the same main group of different metals or Non-metallic reaction with the same substance, the more reactive metal or non-metallic reaction