6.5- Metals and non-metals react with oxygen

Question 1

Oxidation reactions with metals

Answer 1

When molecule’s reaction with oxidation. When metals react with oxygen, a basic metal oxide is formed. As the metal has formed a compound it is also classified as a corrosion reaction. Metal oxide produced an ionic compound. Very reactions metals can cause oxidation to be exothermic (release energy). Moderately reactive metals have slower exothermic-ness. e.g. - 2Mg(s) + O2(g) -> O2 (g) -> 2MgO (s)

Question 2

Oxidation reactions with non-metals

Answer 2

• Nonmetals in group 18 do not react with oxygen (non-metal)
• Other nonmetals to react with oxygen- form a covalent bond
• E.g. formation of water and carbon dioxide
• Both reactions are highly exothermic
• The first one can cause explosions
• Carbon is the principle of constituent of coal
• Both reactions produce a flame and are classified as combustion reactions
• Combustion reactions require oxygen and a fuel
  o A fuel is a substance that will undergo a chemical reaction in which a large amount of useful energy is produced at a fast but controllable rate
  o Substances we use to produce heat/electricity and run engines and motors