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Chapter 3 Explanation of the production of
bubble with iron carbide
3.1 The organic substance which is a product of an ecosystem
of carbon atom
3.1.a Outline of the explanation
Why does carbonated water with iron produce iron oxide and iron carbide?
Electronegativity of carbon atom is larger than that of hydrogen atom.
Then, the iron atom takes oxygen atom from carbon dioxide as described
in Eq.(3.1). The released free carbon atom connects with iron atom and
compound of iron carbide (Fe
3C) is made as described in Eq.(3.2).
2Fe
3+ + 3{H
2O + CO
2} → 3Fe
2O
3 + {3C + 6H}
(3.1)
2Fe
3+ + {3C + 6H} → 3Fe
3C + 3H
2 (3.2)
The carbon atom is able to change the bonding partner from oxygen atom
to iron atom. The iron carbide reacts with water, and produces oxide of
iron and free atom of hydrogen and that of carbon as described in Eq.(3.3).
2Fe
3C + 9H
2O → 3Fe
2O
3 + {C
2H
2} + 8H
2 (3.3)
These free atoms and water are able to form the bubble in which hydrogen gas is covered with membrane made of organic substance.
3.1.b Characteristics of carbon atom
The types of carbon compounds are listed in Table 4.
Table 4 A classification of carbon compounds
(１) Carbon atoms forms allotropes such as diamond, graphite and amorphous
carbon.
(２) Carbon atoms form simple bond, double bond, and triple bond between
the carbon.
(３) Carbon atoms form hydrocarbon and carbohydrate.
(４) Carbon atoms form organometallic compound such as calcium carbide.
(５) A carbon atom forms carbon oxide and carbon chloride.
Valence electrons of carbon occupy electronic state that fits to its
circumstance among possible states. That is the ecosystem of atom in which
each electronic state of atom is adapted to its environment. So, the mineral
or material tells the environment in which it was formed.
3.1.b Solubility of carbon dioxide to the water
The volumes of gas (cc) that dissolves in the water (1cc) at 0℃ 1atm
are shown in Figure 14 [6]. The data tell that carbon dioxide and acetylene
dissolve in water well.
-3.1-
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