10 examples of endothermic reactions with equations
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Examples of exothermic reactions:
1.The burning or combustion of hydrocarbon fuels (see Oil Products) e.g. petrol or candle wax, these are very exothermic reactions.
2.The exothermic burning-combustion of fossil fuels is very important source of energy.
methane (natural gas) + oxygen ==> carbon dioxide + water (+ heat energy)
CH4 + 2O2 ==> CO2 + 2H2O
3.The burning of magnesium, reaction of magnesium with acids, or the reaction of sodium with water (see Metal Reactivity Series)
2Mg + O2 ==> 2MgO (+ heat energy)
4.Using hydrogen as a fuel in hydrogen-oxygen fuel cells (see Electrochemistry).
5.All these combustion reactions are oxidations.
6.Explosions are caused by VERY fast exothermic reactions producing very fast large expanding volumes of gases.
7.Metal displacement reactions are also exothermic. If you add iron filings to copper sulfate solution there is quite a temperature rise.
iron + copper sulfate ===> iron sulfate + copper
Fe(s) + CuSO4(aq) ==> FeSO4(aq) + Cu(s)
8.The neutralisation of acids with alkalis (see Acids, Bases and salts) e.g.
sodium hydroxide + hydrochloric acid ==> sodium chloride + water
NaOH + HCl ==> NaCl + H2O (+ heat energy)
9.Its the same for the neutralisation reactions between potassium hydroxide and sulfuric and nitric acids etc.
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