Chapter 8, Problem 99E

A loud classroom demonstration involves igniting a hydrogen filled balloon. The hydrogen within the balloon reacts explosively with oxygen in the air to form water according to this reaction.

$2{\text{H}}_2\left(g\right)+{\text{O}}_{\text{2}}\left(g\right)\to 2{\text{H}}_2\text{O}\left(g\right)$

If the balloon is filled with a mixture of hydrogen and oxygen, the explosion is even louder than if the balloon is filled with only hydrogen; the intensity of the explosion depends on the relative amounts of oxygen and hydrogen within the balloon. Consider the molecular views representing different amounts of hydrogen and oxygen in four different balloons. Based on the balanced chemical equation, which balloon will make the loudest explosion?