Exergonic Reaction

[Edher]

Saludos,

Why is it that an exergonic reaction is coinsidered spontaneous (no need of outside energy) when it clearly needs thermal energy to activate the reaction?

Thank You,
Edher

[mith]

I think it's because the activation energy needed is very low and can be easily activated from latent heat.

[thank.darwin]

It is spontaneous because once it starts it keeps going on its own - unlike endergonic reactions that need a constant input of energy to keep them going.