The following are some possible reactions involving gases in the Martian atmosphere: Reaction A: CO(g) + 3H2(g) =CH4(9) + H2O(g) Reaction B: 2NO2(g) + 2NO(g) + O2(g) What is true about Reaction B? the reaction is likely exothermic because more gas molecules are produced the reaction is likely endothermic because the products have weaker bonds the reaction is likely endothermic because many products are formed the reaction is likely exothermic because products have stronger bonds