The answer is none of the above. If you look at the reaction results, you'll notice that one of the products make are K2O. Because of this ratio, it's essentially impossible to balance this equation.
The type of chemical reaction is decomposition, as the compound is being broken down into other smaller compounds.
I think it is kinetics because:
When the molecules move or vibrate more, they have a higher kinetic energy, and this is recorded as an increase in the temperature.
Exothermic, because it is releasing heat energy into its environment