Why is sample dropped into the preheated furnace before the oxygen concentration reaches its peak in Figure 27-9?

• The loss of electrons by a molecule, atom, or ion during a reaction is referred to as oxidation.When the oxidation state of a molecule, atom, or ion increases, this is referred to as oxidation.
• Reduction is a half-reaction in which a chemical species reduces its oxidation number by gaining electrons. The other half of the reaction involves oxidation, which involves the loss of electrons.

We will state why the sample is being dropped into the preheated furnace before the oxygen concentration reaches its peak.

Pyrolysis:

• Pyrolysis (thermal decomposition) is a process of heating the substance in the absence of added oxygen in the atmosphere in order to convert:
• The oxygen to carbon dioxide (reduction)
• Here the substance passes through a catalyst

In the Figure 27-9 the pyrolysis gives gaseous products before the oxidation that occurs. This is accomplished by dropping the sample into the preheated furnace (before excess oxygen is present).

This would minimize the production of nitrogen oxides which are highly reactive gases

Therefore the reason why the sample is being dropped into the preheated furnace before the oxygen concentration reaches its peak is explained in this problem.