We blow up a balloon from 5 Liters to 10 Liters and tie it off. Then we pass out from lack of oxygen. The balloon initially had 18 mol of CO2, how many moles of CO2 are in the balloon at the end? It is not 9!

Consider the following reactions. (note: (s) = solid, (l) = liquid, and (g) = gas.) mg(s) + ½o2(g) → mgo(s) + 146 kcal/mole h2(g) + ½o2(g) → h2o(g), δh = -57.82 kcal/mole what type of reaction is represented by the previous two examples?