Living an example list two information which make a chemical equation more informative (useful)
Answers
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 up / down arrow to denote evolve gas / precipitation.
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Answer:
(a) 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).
Zn (s) + H_2SO_4 (aq) → ZnSO_4 (aq) + H_2 (g)
(ii) By indicating the heat changes taking place in the reaction. For xxample: An exothermic reaction is indicated by writing "+Heat" or "+Heat energy" or "+Energy" on the products side of an equation.
C (s) + O_2 (g) → CO_2 (g) + Heat
(iii) By indicating the "conditions" under which the reaction takes place.
Example: Delta stands for heat which is written over the arrow of the equation.
(b) Ca(OH)_2 (aq) + CO_2 (g) → CaCO_3 (s) + H_2O (l)