For example, if O2, CO2 and H2O are in the gas phase, the initial 38 molecules
transform to 51 molecules and the final volume grows in 7.2% (13.8 ? 14.4 -21%). If
CO2 is not considered in the final volume or it is supposed to be dissolved in the water that
seals the volume, and if the H2O molecules are supposed to condense in the liquid phase,
then the initial 38 O2 molecules disappear from the gas volume producing a final gas
volume 21% smaller than the initial air volume. If there is not enough oxygen to sustain the
reaction, the change in volume should be less than these values because only a fraction of
the oxygen is consumed.