C₂H₄ (g) + 2 H₂O (l) → 4 H₂ (g) + 2 CO (g)

This is an oxidation-reduction (redox) reaction:

Reactants:

• C₂H₄ – Ethene
  • Other names: Ethylene , CH2=CH2 , H2C=CH2 , R-1150
  • Appearance: Colorless gas ; Colourless compressed gas with characteristic odour
• H₂O – Water, oxidane
  • Other names: Water (H2O) , Hydrogen hydroxide (HH or HOH) , Hydrogen oxide ... show moreDihydrogen monoxide (DHMO) (systematic name) , Hydrogen monoxide , Dihydrogen oxide , Hydric acid , Hydrohydroxic acid , Hydroxic acid , Hydrol , Μ-oxido dihydrogen , Κ1-hydroxyl hydrogen(0) show less
  • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas

Products:

• H₂
  • Names: Dihydrogen , Hydrogen , H2 ... show moreH₂ , Molecular hydrogen gas , Hydrogen gas , Hydrogen molecule , Molecular hydrogen show less
  • Appearance: Odourless colourless compressed gas
• CO – Carbon monoxide
  • Other names: Carbon monooxide , Carbonous oxide , Carbon(II) oxide ... show moreCarbonyl , Flue gas , Monoxide , Carboneum oxygenisatum , CO , C#O , [CO] , Carbon oxide , Carbonic oxide show less
  • Appearance: Colorless gas ; Odourless tasteless colourless compressed gas ; Colorless, odorless gas. [Note: Shipped as a nonliquefied or liquefied compressed gas.]