Question

How can a balanced chemical equation can be more enformative ? Explain with example

Answer 1

1) By indicating their physical states on both the sides. (l) for liquids, (aq) for aqueous, (g) for gaseous and (s) for solids.

  Ex:- Fe₂O₃(s)+ 2Al(s)------> 2Fe(s)+ Al₂O₃(s)

2) By showing whether heat is absorbed or released.

   Ex:- i) C+ O₂------> CO₂+ Heat  (Exothermic)

          ii) N₂+ O₂+ Heat ------> 2NO  (Endothermic)

3) By showing whether the gas is evolved or not. It is denoted by upward arrow.

Ex:- Zn+ H₂SO₄-----> ZnSO₄+ H₂↑