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一、燃烧热和中和热的异同相同点:都为放热,ΔH<0,单位:kJ/mol不同点:所限物的标准不一样。燃烧热:25℃,101 kPa时1 mol纯物质完全燃烧生成稳定的氧化物时放出的热量。中和热:在稀溶液中,强酸与强碱反应,生成1 mol H2O(l)时放出的热量。二、正确理解燃烧热、中和热1.文字叙述燃烧热、中和热时,用“正值”或“ΔH”表示。
First, the similarities and differences between the heat of combustion and the heat of neutralization are the same: both are exothermic, ΔH <0, unit: kJ / mol Difference: The standard of limited matter is not the same. Heat of combustion: Heat released when 1 mol of pure substance is completely combusted at 25 kPa and 101 kPa to form a stable oxide. Neutralizing heat: In dilute solution, the strong acid reacts with the strong alkali to generate 1 mol H2O (l) when the heat released. Second, a correct understanding of the heat of combustion, heat and neutralization 1. The text describes the heat of combustion, and heat, with “positive” or “ΔH” said.