Formation of Calcium Hydroxide
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CaO + H2O → Ca(OH)2
概要
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.
参加者
| 役割 | 物質 | 係数 | 状態 |
|---|---|---|---|
| 反応物 | Calcium Oxide CaO | 1 | (s) |
| 反応物 | Water H₂O | 1 | (l) |
| 生成物 | Calcium Hydroxide Ca(OH)₂ | 1 | (s) |
日常の例
Self-heating food cans and chemical heating packs sometimes use this reaction between quicklime and water to generate heat.
産業上の重要性
水酸化カルシウムは水処理、製紙、砂糖精製、建設材料のモルタル・石膏成分として利用される。pH調整や土壌安定化、排ガス脱硫にも広く使われる。
特性
- タイプ
- Synthesis
- 可逆的
- いいえ
- エネルギー
- 発熱性
- ΔH
- -65.2 kJ/mol
関連する反応
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.