CHEMICAL REACTION:
CHEMICAL REACTION
is a process which substance,known as reactant,undergo a transformation to form new substances called product's.
during chemical reaction,the bond's between atoms are broken and reformed ,leading to a change in the chemical structure
and properties of the substances involved.
TYPES OF CHEMICAL REACTION:
- Synthesis Reaction:
- Decomposition
- Single Replacement Reaction
- Double Replacement Reaction
- Combustion Reaction
- Redox Reaction
EXAMPLE OF A CHEMICAL REACTION:
- Combustion Of Methane (CH2)
- REACTANTS:METHANE (CH4) AND OXYGEN (02)
- PRODUCTS:CARBON DIOXIDE(CO2)AND WATER(H2O)
THE CHEMICAL EQUATION FOR THIS REACTION IS:
CH4+2O2->CO2+2H2O
THERE ARE MAINLY TWO TYPE OF CHEMICAL REACTION:
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1 In endothermic reaction heat is absorbed from surroundings.
2 EXAMPLE:melting ice,cooking...
1 In exothermic reaction released from the system to its environment.
2 EXAMPLE:rusting iron,nuclear fission...
ENDOTHERMIC REACTION
- heat is absorbed by the system
- temperature of the surrounding is decreased
- favoured by a high temperature surrounding
EXOTHERMIC REACTION:
- heat is released by the system
- temperature of the surrounding is increased
- favoured by a low temperature surrounding