The production of ammonia is an exothermic reaction.
The breaking of bonds is an endothermic process requiring energy, while the making of bonds is an exothermic process with energy being released.
The reaction on the surface is exothermic, so the gases heat up.
A nuclear power plant is exothermic. It generates tons of heat into the biosphere that never would have been there otherwise.
The analysis of the inner reaction-diffusion layer yields the heat flux produced by the exothermic reaction.
I n (3.7b) expressing the kinetic law governing the heat flux released by the exothermic reaction, we have only retained the flame temperature modification (#, $; 1).
This is because these eight reactions are exothermic whereas the others are endothermic.
The reason for the low barrier is that the reaction is quite exothermic at 20 kcal molx1.
