Why are exothermic reactions more common than endothermic reactions?

  • 0 votes

GCSE Chemistry C2 maybe C3 as our teacher's a bit ahead a lot of the time...

Posted Wed 10th October, 2012 @ 20:48 by Hoosierette
Edited by Hoosierette on Thu 11th October, 2012 @ 18:51

1 Answer

  • 1 vote

Probably because as exothermic reactions give off heat, they tend to be runaway reactions: once the reaction is triggered on one part of the substance the heat given off triggers it on more of the substance etc etc. Boom.

Because endothermic reactions soak up enery they have the opposite effect - stifling the reaction, shutting it down. So there needs to be a continual supply of free energy to keep the reaction going. This is much rarer in nature.

This is a guess btw, but it makes sense to me.

Answered Thu 11th October, 2012 @ 01:31 by Robotperson
Edited by Robotperson on Thu 11th October, 2012 @ 01:32