Thermal decomposition of calcium carbonate ?

In summary, heating calcium carbonate to temperatures below 825 degrees Celsius will not result in decomposition into calcium oxide. This type of decomposition occurs only at temperatures above 825°C, as explained by the Gibbs free energy. The standard state for this reaction is likely at a partial pressure of 1 atm.
  • #1
makky2008
2
0
In general, we heat CaCO3 to temperature of approximately 825°C it decomposes into calcium oxide and liberates carbon dioxide gas:

CaCO3 →825°C→ CaO + CO2

Is it possible to heat the calcium carbonate at temperatures below 825 degrees Celsius, so the decomposition into calcium oxide.
 
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  • #2
makky2008 said:
Is it possible to heat the calcium carbonate at temperatures below 825 degrees Celsius

Sure, you can heat it to any temperature you want :wink:

so the decomposition into calcium oxide.

Please translate into English, no idea what you were trying to ask.
 
  • #3
If the OP is asking if calcium carbonate will decompose at a temp. below 825 C, the answer is no.

See this article:

http://en.wikipedia.org/wiki/Calcination

This type of decomposition occurs only at temperatures above which the Gibbs free energy is zero. Certainly, if this reaction could occur at lower temps., the cement and lime industry would be all over it.
 
  • #4
This is slightly more complicated, 825 C is probably for a standard state, when the partial pressure of CO2 is expected to be 1 atm.
 
  • #5
Thank you very much Mr.Borek and SteamKing.
 

1. What is thermal decomposition of calcium carbonate?

Thermal decomposition of calcium carbonate is a chemical reaction in which calcium carbonate (CaCO3) is broken down into calcium oxide (CaO) and carbon dioxide (CO2) by applying heat.

2. What is the chemical equation for thermal decomposition of calcium carbonate?

The chemical equation for thermal decomposition of calcium carbonate is: CaCO3(s) → CaO(s) + CO2(g).

3. What is the temperature range for thermal decomposition of calcium carbonate?

The temperature range for thermal decomposition of calcium carbonate is typically between 600-900°C. However, this may vary depending on the purity and particle size of the calcium carbonate.

4. What is the significance of thermal decomposition of calcium carbonate?

Thermal decomposition of calcium carbonate is an important process in various industries, such as cement production, lime production, and glass manufacturing. It is also a key step in the carbon cycle, as it releases carbon dioxide into the atmosphere.

5. How does the rate of thermal decomposition of calcium carbonate change with temperature?

The rate of thermal decomposition of calcium carbonate increases with temperature. This is because at higher temperatures, more energy is available for the breaking of chemical bonds, leading to a faster reaction rate.

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