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C2.5 Exothermic And Endothermic Reactions
- C2.5.1 Energy Tranfer In Chemical Reactions
- Chemical reactions involve energy transfers.
Many chemical reactions involve the release
of energy. For other chemical reactions to
occur, energy must be supplied.
- When chemical reactions occur, energy is transferred
to or from the surroundings.
- An exothermic reaction is one
that transfers energy to the
surroundings. Examples of
exothermic reactions include
combustion, many oxidation
reactions and neutralisation.
Everyday uses of exothermic
reactions include self-heating
cans and hand warmers.
- An endothermic reaction is one
that takes in energy from the
surroundings. Endothermic
reactions include thermal
decompositions. Some sports
injury packs are based upon
endothermic reactions.
- If a reversible reaction is exothermic in one direction, it is endothermic in the opposite direction.
The same amount of energy is transferred in each case.
- If a reversible reaction is exothermic in one direction, it is endothermic in the opposite direction.
The same amount of energy is transferred in each case.
- An endothermic reaction is one
that takes in energy from the
surroundings. Endothermic
reactions include thermal
decompositions. Some sports
injury packs are based upon
endothermic reactions.
- An exothermic reaction is one
that transfers energy to the
surroundings. Examples of
exothermic reactions include
combustion, many oxidation
reactions and neutralisation.
Everyday uses of exothermic
reactions include self-heating
cans and hand warmers.
- When chemical reactions occur, energy is transferred
to or from the surroundings.
- Chemical reactions involve energy transfers.
Many chemical reactions involve the release
of energy. For other chemical reactions to
occur, energy must be supplied.
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