Combustion Reaction Calculator

Find O₂, CO₂ and H₂O for burning a hydrocarbon.

O₂ needed (mol per mol fuel) 5

CO₂ produced (mol) 3

H₂O produced (mol) 4

Formula: CₓHᵧ + (x + y/4) O₂ → x CO₂ + (y/2) H₂O

Step-by-step with your numbers:

1. Values used:

2. Carbon atoms (x) = 3

3. Hydrogen atoms (y) = 8

5. O₂ needed = 5mol per mol fuel

6. CO₂ produced = 3mol

7. H₂O produced = 4mol

Did we solve your problem today?

Balance the complete combustion of a hydrocarbon CₓHᵧ.

The math behind it

CₓHᵧ + (x + y/4) O₂ → x CO₂ + (y/2) H₂O (per mole of fuel).

Propane C₃H₈ → 5 O₂, 3 CO₂, 4 H₂O.

Incomplete combustion?

Less O₂ produces CO and soot — not covered here.