2007-01-19 06:27:40 · 7 answers · asked by Random111 1 in Science & Mathematics ➔ Chemistry
Limestone is a sedimentary rock composed largely of the mineral calcite (calcium carbonate: CaCO3)
When limestone is heated in a kiln at over 900oC, it breaks down into quicklime (calcium oxide) and carbon dioxide. Both are useful products. This type of reaction is endothermic (heat absorbing), reversible and an example of thermal decomposition.
* calcium carbonate (limestone) ==> calcium oxide (quicklime) + carbon dioxide
* CaCO3(s) -------> CaO(s) + CO2(g)
2007-01-19 06:34:44 · answer #1 · answered by Jesus is my Savior 7 · 1⤊ 0⤋
Heating Limestone
2016-11-17 00:48:36 · answer #2 · answered by ? 4 · 0⤊ 0⤋
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what kind of reaction happens to limestone when heated?
2015-08-23 23:29:59 · answer #3 · answered by Claude 1 · 0⤊ 0⤋
Thermal decomposition.
Limestone is an impure form of calcium carbonate.
When calcium carbonate is heated to red-heat, it decomposes into calcium oxide and carbon dioxide.
Calcium Carbonate = Calcium Oxide + Carbon Dioxide.
CaCO3 = CaO + CO2
Calcium oxide is a base. It is known in everyday terms as 'quicklime'. Visually, calcium carbonate and calcium oxide look the same, they are both white in colour, and have a similar texture.
2007-01-19 08:04:12 · answer #4 · answered by lenpol7 7 · 0⤊ 0⤋
I had limestone on two sides of my outdoor fire pit, not being aware of the heat reaction, on third firing of the pit I heard these loud cracking noises and noticed that pieces of stone were thrown out of the pit to a distance of up to 20 feet. We were fortunate not to have been sitting in front of the fire pit which we usually do. We could have been injured for sure!
2014-10-06 20:14:36 · answer #5 · answered by omar n 1 · 0⤊ 0⤋
See wikipedia.org for.....Limestone and Calcite
Limestone is Calcite, and when heated, will decompose to calcium oxide and carbon dioxide, according to the reaction:
CaCO3→CaO + CO2
2007-01-19 06:36:17 · answer #6 · answered by Anonymous · 0⤊ 0⤋
When limestone, which is calcium carbonate, is heated in a furnace it loses carbon dioxide and becomes lime, ( CaO)
CaCO3 ----heat-----> CaO + CO2
2007-01-19 06:34:44 · answer #7 · answered by Kender_fury 3 · 0⤊ 0⤋
a) CaCO3 → CaO + CO2 b) Molar mass CaCO3 = 100.09 g/mol Molar mass CaO = 56.077 g/mol From the balanced equation, 1mol CaCO3 produces 1mol CaO 250g CaO = 250/56.077 = 4.458mol 4.458mol CaCO3 = 4.458*100.09 = 446.22g CaCO3 But the CaCO3 is 95% pure, therefore mass must be: 446.22*100/95 = 469.7grams Mass of CaCO3 required is 469.7 grams.
2016-03-12 21:19:57 · answer #8 · answered by ? 4 · 0⤊ 0⤋
It depends on how hot you get it.The rock crushers heats the lime stone at 3000 degrees then applies pressure to it to break it down into smaller sizes using it for pavement on the highways.
2007-01-19 06:37:32 · answer #9 · answered by cactusjoe 2 · 0⤊ 0⤋
a decomposition reaction occurs
2007-01-19 14:06:49 · answer #10 · answered by J D 3 · 0⤊ 0⤋