Published byAngela Marshall Modified over 8 years ago
Types of Chemical Reactions: Combustion & Corrosion
Combustion when a fuel reacts quickly with oxygen
produces oxides and energy important source of fuel is hydrocarbons
Complete Combustion of Hydrocarbons
if lots of oxygen is available, complete combustion produces carbon dioxide and water hydrocarbon + oxygen carbon dioxide + water + energy CxHy + O2 CO2 + H2O + energy Example Complete combustion of butane (C4H10): 2 C4H10(g) O2(g) 8 CO2(g) H2O(g) + energy
Incomplete Combustion of Hydrocarbons
if oxygen supply is limited produces carbon monoxide gas, carbon (soot), plus carbon dioxide and water orange flames are often present Example C4H10(g) + 5 O2(g) 2 CO2(g) H2O(g) + CO(g) + C(s) + energy
Other Types of Combustion
other substance react with oxygen forms oxides General word equation: element + oxygen oxide + energy General chemical equation: A O2 AO + energy Example: Mg(s) + O2(g) 2MgO(s) + energy video clip
Corrosion breakdown of a metal, due to a reaction with chemicals in the environment common example?
Rust corrosion of iron reaction with oxygen and water
electrolytes act as a catalyst can prevent with paint or plastic coating
4 Al(s) + 3 O2(g) 2 Al2O3(s) + energy
Beneficial Corrosion Sometimes corrosion of some metals forms a tough protective layer that prevents further corrosion For example, Aluminum: 4 Al(s) O2(g) 2 Al2O3(s) + energy
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