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Assessment
What is the main source of energy in an exothermic reaction?
The formation of bonds
The breakage of bonds
External heat supply
Catalysts
What is the role of activation energy in a chemical reaction?
It decreases the temperature of the reaction.
It is the energy barrier that must be overcome for the reaction to occur.
It is the energy released during the reaction.
It determines the concentration of reactants.
Which of the following processes is an example of an endothermic reaction?
Combustion of fuels
Photosynthesis in plants
Respiration in animals
Neutralization of acids and bases
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