Answer is: Reactants and products are written in words; reactants are on the left, products are on the right side of reaction.
For example, balanced chemical reaction for cellular respiration (convert biochemical energy):
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O or:
glucose + oxygen → carbon dioxide + water.
Glucose and oxygen are reactants and carbon dioxide and water are products of reaction.
This reaction is exothermic (energy is released).
Word equation is a chemical reaction expressed in words rather than chemical formulas.
