Question

Giving an example list two information which make a chemical equation more useful (informative).

Answer 1

Just the chemical equation lacks to provide much information like state of reactants and products, involvement of heat during reaction etc.
To overcome this we add notations like delta to indicate the involvement of heat, mention the state in parenthesis beside the reactants and products, putting up / down arrow to denote evolve gas / precipitation.
 
e.g.
 
C (s) + O2 (g) = CO2 (g) ↑ + Δ

Answer 2

Explanation:

Chemical equations can be more informative if they have the following characteristics: - Body condition:

• There are three types of states: solid, liquid, and gaseous. If a substance exists in a solid state, it is represented by (s).
• If the substance appears in an aqueous state, it is denoted as (aq).
• If the substance is in a gaseous state, it is represented by (g).
• The development of gaseous matter,if a gas is liberated in a reaction, it is indicated by an arrow above, and its physical state is indicated by an arrow downward (g).

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