Catalysts
endothermic reaction
Breaking bonds requires energy.
transfer of energy from one form to another.
Chemical reactions that release energy often occur spontaneously. Chemical reactions that absorb energy will not occur without energy.
Exothermic reactions. Such as combustion or reactions whereby the energy required for bond forming is greater than the energy absorbed for bond breaking.
Catalysts
Catalysts
Activation energy describes the energy that is required to get chemical reactions started.
endothermic reaction
Breaking bonds requires energy.
no, some reactions are spontenous.
It is released from the cracker by the chemical bonds breaking up.
transfer of energy from one form to another.
"Activation Energy reactions"; Endothermic reactions require energy.
These are not chemical reactions but thermonuclear reactions.
Chemical reactions that release energy often occur spontaneously. Chemical reactions that absorb energy will not occur without energy.
Chemical energy