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Oxidation of sugar with potassium chlorate
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The thermal decomposition of potassium chlorate produces potassium chloride and an excess of oxygen, which is sufficient to ignite the sugar. The heat produced continues to decompose The potassium chlorate resulting in a very rapid combustion reaction.
Equations:
2KClO3(s) → 3O2(g) + 2KCl(s)
C12H22O11(s) + 12O2(g) = 12CO2(g) + 11H2O(l) + heat (delta-r-H) = -5645 KJ/mol-rxn.
Potassium chlorate is used in chemical oxygen generators (also called chlorate candles or oxygen candles), employed as oxygen-supply systems of e.g. aircraft, space stations, and submarines, and has been responsible for at least one plane crash. A fire on the space station Mir was also traced to this substance. The decomposition of potassium chlorate was also used to provide the oxygen supply for limelights. In chemical labs it is used to oxidize HCl and release small amounts of gaseous chlorine. Sucrose does not melt at high temperatures. Instead, it decomposes at 186 °C (367 °F) to form caramel. Like other carbohydrates, it combusts to carbon dioxide and water. Mixing sucrose with the oxidizer potassium nitrate produces the fuel known as rocket candy that is used to propel amateur rocket motors.
C12H22O11 + 6 KNO3 → 9 CO + 3 N2 + 11 H2O + 3 K2CO3
This reaction is somewhat simplified though. Some of the carbon does get fully oxidized to carbon dioxide, and other reactions, such as the water-gas shift reaction also take place. A more accurate theoretical equation is:
C12H22O11 + 6.288 KNO3 → 3.796 CO2 + 5.205 CO + 7.794 H2O + 3.065 H2 + 3.143 N2 + 2.998 K2CO3 + 0.274 KOH.
Sucrose burns with chloric acid, formed by the reaction of hydrochloric acid and potassium chlorate:
8HClO3 + C12H22O11 → 11H2O + 12CO2 + 8HCl
Sucrose can be dehydrated with sulfuric acid to form a black, carbon-rich solid, as indicated in the following idealized equation:
H2SO4(catalyst) + C12H22O11 → 12C + 11H2O + Heat (and some H2O + SO3 as a result of the heat).
The formula for sucrose's decomposition can be represented as a two-step reaction: the first simplified reaction is dehydration of sucrose to pure carbon and water, and then carbon oxidises to CO2 with O2 from air.
C12H22O11 + heat → 12C + 11H2O
12C + 12O2 → 12CO2
“.... and as always, thanks for watching!”
Equations:
2KClO3(s) → 3O2(g) + 2KCl(s)
C12H22O11(s) + 12O2(g) = 12CO2(g) + 11H2O(l) + heat (delta-r-H) = -5645 KJ/mol-rxn.
Potassium chlorate is used in chemical oxygen generators (also called chlorate candles or oxygen candles), employed as oxygen-supply systems of e.g. aircraft, space stations, and submarines, and has been responsible for at least one plane crash. A fire on the space station Mir was also traced to this substance. The decomposition of potassium chlorate was also used to provide the oxygen supply for limelights. In chemical labs it is used to oxidize HCl and release small amounts of gaseous chlorine. Sucrose does not melt at high temperatures. Instead, it decomposes at 186 °C (367 °F) to form caramel. Like other carbohydrates, it combusts to carbon dioxide and water. Mixing sucrose with the oxidizer potassium nitrate produces the fuel known as rocket candy that is used to propel amateur rocket motors.
C12H22O11 + 6 KNO3 → 9 CO + 3 N2 + 11 H2O + 3 K2CO3
This reaction is somewhat simplified though. Some of the carbon does get fully oxidized to carbon dioxide, and other reactions, such as the water-gas shift reaction also take place. A more accurate theoretical equation is:
C12H22O11 + 6.288 KNO3 → 3.796 CO2 + 5.205 CO + 7.794 H2O + 3.065 H2 + 3.143 N2 + 2.998 K2CO3 + 0.274 KOH.
Sucrose burns with chloric acid, formed by the reaction of hydrochloric acid and potassium chlorate:
8HClO3 + C12H22O11 → 11H2O + 12CO2 + 8HCl
Sucrose can be dehydrated with sulfuric acid to form a black, carbon-rich solid, as indicated in the following idealized equation:
H2SO4(catalyst) + C12H22O11 → 12C + 11H2O + Heat (and some H2O + SO3 as a result of the heat).
The formula for sucrose's decomposition can be represented as a two-step reaction: the first simplified reaction is dehydration of sucrose to pure carbon and water, and then carbon oxidises to CO2 with O2 from air.
C12H22O11 + heat → 12C + 11H2O
12C + 12O2 → 12CO2
“.... and as always, thanks for watching!”
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