Question

Q.3 Giving an example list two information which make a chemical equation
more useful informative
​

Answer 1

Answer:

The various ways in which a chemical equation can be made more informative are : (i) By indicating the physical states of the reactants and products. Example: Gaseous state is indicated by the symbol (g). (ii) By indicating the heat changes taking place in the reaction.

Hope this helps

Answer 2

Answer: Look at the explanation

Explanation:

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 an up / down arrow to denote evolve gas / precipitation.

e.g.

C (s) + O2 (g) = CO2 (g) ↑ + Δ