Formation of Calcium Carbonate from Oxides

CaO + CO2 → CaCO3

概述

Calcium oxide reacts with carbon dioxide to form calcium carbonate. This is the reverse of the lime-burning process and occurs naturally in geological carbon sequestration. Limewater (calcium hydroxide solution) turns milky when CO2 is bubbled through due to this reaction.

参与者

角色 物质 系数 状态
反应物 Calcium Oxide CaO 1 (s)
反应物 Carbon Dioxide CO₂ 1 (g)
产物 Calcium Carbonate CaCO₃ 1 (s)

日常示例

The classic limewater test for carbon dioxide relies on this reaction, as the milky precipitate is calcium carbonate.

工业重要性

这一反应是碳捕获与矿化（CCUS）技术的基础，也是混凝土碳化的机理。工业上可利用此反应将CO₂永久固化为固态碳酸钙矿物。

属性

类型
Synthesis
可逆
是
能量
放热
ΔH
-178.3 kJ/mol

相关反应

Formation of Calcium Hydroxide 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 Fischer-Tropsch Synthesis (General)

Frequently Asked Questions

What is the equation for Formation of Calcium Carbonate from Oxides?
The balanced equation is: CaO + CO₂ → CaCO₃.
What type of reaction is Formation of Calcium Carbonate from Oxides?
Formation of Calcium Carbonate from Oxides is a synthesis reaction. It is reversible under certain conditions.
Is Formation of Calcium Carbonate from Oxides exothermic or endothermic?
Formation of Calcium Carbonate from Oxides is exothermic (releases energy). The enthalpy change (ΔH) is -178.3 kJ/mol.