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Calcium oxide, like many other metal oxides, forms a chemical bond with CO2 to form a carbonate. Thermodynamically, the reaction between CaO and CO2 to form CaCO3 is accompanied (at room temperature) by a decrease in the free energy of the system. If the CaO (called lime) is porous, the CO2 will diffuse throughout the piece and eventually, at room temperature, convert it completely to CaCO3 (called limestone). The reaction to form limestone is so favorable that lime will react with the CO2 in the atmosphere. What's more, if the lime has already reacted with water vapor to form hydrated lime (CaH2O2), the hydrated lime will also react with CO2 from the atmosphere to form limestone. If you heat limestone to 1200 degrees Celsius, it will decompose back to lime and CO2.

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Q: What property of calcium oxide means it reacts readily with carbon dioxide?
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What is the chemical symbol for calcium oxide plus carbon dioxide?

Calcium oxide is CaO, and carbon dioxide is CO2.


What are the word equations for processes that release or store carbon doixide?

Some of the process that fix carbon dioxide are limewater + carbon dioxide equals calcium carbonate + water. Another is calcium carbonate + water + carbon dioxide = aqueous calcium bicarbonate. These equations work in reverse to release carbon dioxide.


Is carbon dioxide a chemical property?

No, carbon dioxide is not a chemical property. In fact, it isn't even a property. It is a molecule.


Why is carbon dioxide created in a lime kiln?

Calcium Carbonate is decomposed into Calcium Oxide and Carbon Dioxide when massive amount of heat is provided.


How do identify carbon dioxide?

With a carbon dioxide detector, meter, or gauge. If oxygen levels and dangerously low and carbon dioxide dangerously high you will have trouble breathing. -written by a weirdo With a carbon dioxide detector, meter, or gauge. If oxygen levels and dangerously low and carbon dioxide dangerously high you will have trouble breathing. -written by a weirdo


What gas will be produced between hydrochloric acid and calcium carbonate?

carbon dioxide carbon dioxide


What is the chemical that can absorb carbon dioxide?

Carbon dioxide is absorbed in calcium hydroxide and other hydroxides.


What is a positive test for carbon dioxide?

Absorbed carbon dioxide in calcium hydroxide produce calcium carbonate, a white precipitate.


When Calcium carbonate is heated .?

It decomposes into calcium oxide and carbon dioxide...


What happens when carbon dioxide is treated with limewater?

Carbon dioxide is absorbed, react and calcium carbonate is formed.


How do you text for carbon dioxide?

lime water (calcium hydroxide) turns milky when carbon dioxide is present


What happens to calcium carbonate when heated?

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