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Chemistry - Coggle Diagram
Chemistry
Chemical reactions
Chemical Change vs. Physical Change
Chemical Change
A change in a substance that involves a change in chemical make up
Physical Change
A change in a substance that does not involve a change in the chemical make up
Chemical reactions and Collision Theory
Chemical Reactions
A process where a substance called reactant transforms to another one called product
Equation:
Collision Theory
Names the conditions for a chemical reaction
Enough energy to break bonds
The elements must collide in a certain position
Enough Ea
Types of Chemical Reactions
Combination
A+B=AB
Decomposition
AB=A+B
Single Replacement
A+BC=AC+B
Double Replacement
AB+CD=AD+CB
Combustion
Hydrocarbon+O2=CO2+H2O
Oxidation
Metal+O2=Metal Oxide
Common Chemical Reactions: Combustion and Fermentation
Combustion
Chemical reaction related to fire burning Hydrocarbons
Fementation
Bacterias and Fungi intervention for different products
Yeast
Fungi
Bread and wine
Bacteria
From ethanol to wine to vinegar
Cheese
Energy and Heat during a Chemical Reaction
Some Chemical reactions uses/absorbs energy and others releases energy
endergonic (absorbs)
Exergonic (releases)
some of them release and absorbs energy in form of heat
Endothermic (absorbs)
Exothermic (releases)
Measured with: ΔH (Delta Enthalpy)
ΔH+ means absorbs heat
ΔH- means it releases heat
Factors affecting reaction rates
Temperature
+T° +Speed of reaction
Concentration
+amount of reactants +amount of products
Particle size
+small +interaction +speed
Catalysts
+speed of reaction without affecting product
Amount of Ea needed to start the reaction
