The answer to this question can be explained in the basis of physical chemistry and inorganic chemistry.
Physical chemistry defines a spontaneous reaction as one which occurs without any external influence. The oxidation of carbon monoxide is exothermic which means that it goes from left to right with the liberation of heat. An important question arises here: Are all exothermic reactions spontaneous? The answer is : No, not ...
The solution considers an exothermic gas phase reaction.