Activation energy is
the heat released in a reaction
the energy given off when reactants collide
generally very high for a reaction that takes place rapidly
an energy barrier between reactants and products

Iwll give extra points to who gets this for ! what type of reaction is this? ?

In vapor-liquid equilibrium in a binary mixture, both components are generally present in both phases. how many degrees of freedom are there for such a system? the reaction between nitrogen and hydrogen to form ammonia occurs in the gas phase. how many degrees of freedom are there for this system? steam and coal react at high temperatures to form hydrogen, carbon monoxide, carbon dioxide, and methane. the following reactions have been suggested as being involved in the chemical transformation:

What is bromine+calcium iodide--> calcium bromide +iodine balanced