Question

Name the substance used in the manufacturing of cement that produces large amount of heat when mixed with water.

Answer 1

Cement:

1. Cement is made by combining calcium, silica, aluminum, iron, and other components in a well-controlled chemical reaction.
2. Limestone, shells, and chalk are combined with, clay, slate, blast furnace slag, silica sand, and iron ore, which are commonly used in cement production.
3. When heated to high temperatures, these elements combine to form a rock-like substance that is crushed into the fine powder we know as cement.
4. Calcium oxide ($\mathrm{CaO}$), or quicklime or burnt lime, is a chemical substance that is frequently utilized. It is a white, caustic, alkaline, crystalline solid at room temperature.
5. It is often produced through the heat breakdown of calcium carbonate-containing materials such as limestone or seashells.$\underset{\mathrm{Calcium}\mathrm{carbonate}}{{\mathrm{CaCO}}_3\left(\mathrm{s}\right)}\stackrel{∆}{\to }\underset{\mathrm{Calcium}\mathrm{oxide}}{\mathrm{CaO}\left(\mathrm{s}\right)}+\underset{\mathrm{Carbon}\mathrm{dioxide}}{{\mathrm{CO}}_2\left(\mathrm{g}\right)}$
6. It is used to make cement, paper, as well as high-grade steel, and other materials.
7. When calcium oxide combines with water, a lot of heat is released, and calcium hydroxide is formed.$\underset{\mathrm{Caalcium}\mathrm{oxide}}{\mathrm{CaO}\left(\mathrm{s}\right)}+\underset{\mathrm{water}}{{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}\to \underset{\mathrm{Calcium}\mathrm{hydroxide}}{\mathrm{Ca}{\left(\mathrm{OH}\right)}_2\left(\mathrm{s}\right)}+\mathrm{Heat}$
8. The reaction is a combination reaction and exothermic in nature.

Therefore, calcium oxide is the substance used in the manufacturing of cement and produces a large amount of heat.