... reactants, the difference is the heat energy. The energy is given out when forming the bonds between the new water and the carbon dioxide molecules. The complete combustion of an alcohol is when it reacts with oxygen in the air to form water and carbon dioxide. The basic formula for this reaction is Heat Transferred = Mass of Substance (g) x Temperature Change (°C) x Specific Heat Capacity (J) The specific heat capacity is the number of joules required to heat one gram of water by 1°C. Water is used because it is safe, easily found and has a reliable heat capacity of 4.2. The bonds that are formed in an exothermic reaction can be of two types. The first could be ionic, where a metal is produced. Ionic bonding involves two electrons transferring from one atom to the other leaving an electrostatic force between them. The other is covalent bonding where ...

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