Formation of Calcium Hydroxide
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CaO + H2O → Ca(OH)2
概述
Calcium oxide (quicklime) reacts exothermically with water to form calcium hydroxide (slaked lime). This reaction generates considerable heat and can cause water to boil. It is one of the oldest known chemical reactions, used in construction for millennia.
参与者
| 角色 | 物质 | 系数 | 状态 |
|---|---|---|---|
| 反应物 | Calcium Oxide CaO | 1 | (s) |
| 反应物 | Water H₂O | 1 | (l) |
| 产物 | Calcium Hydroxide Ca(OH)₂ | 1 | (s) |
日常示例
Self-heating food cans and chemical heating packs sometimes use this reaction between quicklime and water to generate heat.
工业重要性
氢氧化钙（消石灰）年产量超过3亿吨，广泛用于建筑砂浆、烟气脱硫、饮用水pH调节、废水处理、食品加工和农业石灰化。
属性
- 类型
- Synthesis
- 可逆
- 否
- 能量
- 放热
- ΔH
- -65.2 kJ/mol
相关反应
Formation of Carbon Monoxide
Formation of Nitrogen Dioxide
Formation of Potassium Chloride
Formation of Sodium Bicarbonate
Formation of Sodium Peroxide
Formation of Silicon Dioxide
Formation of Tungsten Carbide
Formation of Copper(II) Sulfide
Formation of Sulfur Dioxide
Fischer-Tropsch Synthesis (General)
Frequently Asked Questions
What is the equation for Formation of Calcium Hydroxide?
The balanced equation is: CaO + H₂O → Ca(OH)₂.
What type of reaction is Formation of Calcium Hydroxide?
Formation of Calcium Hydroxide is a synthesis reaction.
Is Formation of Calcium Hydroxide exothermic or endothermic?
Formation of Calcium Hydroxide is exothermic (releases energy). The enthalpy change (ΔH) is -65.2 kJ/mol.