Chem Unit 2 Types Of Reaction DECOMPOSITION & COMBUSTION REACTIONS Flashcards
Decomposition reaction is…
A reaction that involves a complex substance breaking down into two or more simpler substances
AB → A + B
Decomposition reactions usually need energy to get started
- Reactions that specifically require….
heat are known as thermal decomposition reactions
During decomposition Acids will decompose into…
a non-metal oxide and water, with heat
Ex. Carbonic Acid
H2CO3(aq) → H2O(l) + CO2(g)
During decomposition base when heated will…
decompose into a basic oxide and water
Ex: calcium hydroxide
Ca(OH)2 → CaO + H2O
Other decomposition reactions are
ammonia nitrate: 2 NH4NO3(s)= 2N2( g) + O2( g) + 4 H2O( g)
calcium carbonate: CaCO3(s)Heat⟶CaO (s)+CO2(g)
Combustion reactions are …
A chemical reaction involving an organic compound (a fuel)
burning in oxygen
A hydrocarbon is…
a specific type of organic compound that is made up of only carbon-carbon and carbon hydrogen bonds
Ex: propane
common products of combustion are usually…
carbon dioxide, water and sometimes carbon monoxide
compete combustion of a hydrocarbon is the…
burning of a hydrocarbon with a large supply of oxygen, to produce carbon dioxide, water and energy
Ex: CxHy + O2(g) → CO2(g) + H2O(l) + energy
-there must be excess oxygen for complete combustion
incomplete combustion of a hydrocarbon occurs when…
the supply of oxygen is limited, and products may include carbon monoxide, soot, water and energy
Concerns of incomplete combustion…
- Fuel residue
- Soot particles
- Carbon monoxide
