Calcium Oxide
Calcium oxide, commonly known as quicklime, is a chemical compound consisting of calcium and oxygen, with the chemical formula CaO. It is a white, caustic, alkaline solid at room temperature. Calcium oxide is highly reactive and can react vigorously with water to produce calcium hydroxide, releasing a significant amount of heat in the process.
The following table provides a comprehensive list of calcium oxide properties in both SI and US customary/Imperial units at normal temperature and pressure (NTP).
Note: click on the icon to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Chemical Formula | CaO |
| Molar Mass | 56.077 g/mol |
| Density | 3340 kg/m3 |
| Thermal Properties | Metric |
| Melting Point | 2610 °C |
| Thermal Conductivity | 8 - 16 W/m·K |
| Specific Heat Capacity (Cp) | 753 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 3.88×10-6 1/°C |
Note: unless stated otherwise, all values are taken at room temperature (approximately 20°C or 68°F) and 1 atm pressure. (1 atm = 101,325 Pa)
Related Pages
References: 1) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018. 2) CRC Handbook of Chemistry and Physics, 97th Edition. United Kingdom: CRC Press, 2016-2017.