Thus wrote Charles Darwin on the twenty-second and twenty-fourth of October 1873.[1] At first reading this passage appears rather incongruous, but actually it reflects the true nature of the resurgence of evolution in the Nineteenth Century: but to see this, it behooves us to look back further in history; back to the root of evolution as an idea ...
May 9, 2014. Exothermic reactions are spontaneous because the product created by an exothermic reaction is the most stable product. Exothermic reactions release heat or energy. The more energy something has, the more unstable it will be. Therefore kinetics determines that the most stable product will dominate and as a result exothermic reactions are spontaneous to produce a stable product.
Just because a reaction is spontaneous, it does not automatically imply that these reactions occur instantaneously. An example of this is when iron nails rust due to constant exposure to moisture -- this process does not occur overnight, but can take days or months.