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The potential energy of the molecules change during a reaction.
The potential energy of the molecules change during a reaction.
Conserved.
the potential energy of the molecules changes during a reaction.
The potential energy of the molecules change during a reaction.
Do it yourself idiot.
During a chemical reaction, energy gets used to break the existing bonds in order to create new bonds.
This energy can be transformed in heat, light (chemiluminescence, bioluminescence), rarely in sounds etc.
it lowers the amout of activation energy needed to start the reaction.
Energy is released during a decomposition reaction.
Exothermic reaction is a reaction which gives out heat. For example: when natural gas burns it release its energy to the surroundings which could be the water in a central heating system. this is a EXOTHERMIC REACTION between natural gas and oxygen.
An endergonic reaction is a chemical reaction in which the standard change in free energy is positive, and energy is absorbed. To view the source and read more about endergonic reactions go to: http://en.wikipedia.org/wiki/Endergonic_reaction