Final answer:
The reaction C + O2 = CO2 is a combustion reaction where carbon reacts with oxygen to form carbon dioxide, proceeding through an intermediate formation of carbon monoxide.
Step-by-step explanation:
The reaction C + O2 = CO2 describes the process by which carbon (C) reacts with oxygen (O2) to form carbon dioxide (CO2). This reaction is a type of combustion and involves a series of steps. Initially, solid carbon reacts with oxygen to form carbon monoxide (CO), and then carbon monoxide reacts further with more oxygen to finally form carbon dioxide.
The first step of the gas-phase reaction between carbon monoxide and oxygen requires a collision between the two molecules. The orientation of this collision is crucial; the collision where the carbon side of the carbon monoxide molecule meets the oxygen molecule is more likely to result in the formation of CO2 because this orientation facilitates the formation of a molecule with a central carbon atom bonded to two oxygen atoms (O = C = O).
By algebraically combining chemical equations, we can show the overall reaction as: 2 C(s) + O2(g) → 2 CO(g), followed by 2 CO(g) + O2(g) → 2 CO2(g), to yield an overarching equation of 2 C(s) + 2 O2(g) → 2 CO2(g).