There are many factors affecting explosion power of fuel air mixture, large numbers of them are qualitative and uncertain factors, and the relations between them are very complicated.

Here it would reach supersonic speeds and then shift to its scramjet engine. The scramjet scoops up air and mixes it with fuel so it burns as the mixture flows through the engine at supersonic speeds.

The water evaporates because of the heat present within the fuel cell and it leaves the end of the cell configuration as a mixture of saturated air and liquid water.