Change the following chemical equation into more effective chemical equation by inserting the characteristics expressions of products and reactants.
`Fe2O_(3)+2Al rarr 2Fe+Al_(2)O_(3)`

Explanation

1) Chemical equations can be made more effective by expressing following characteristics of the reactants and products.
i) Physical state
ii) Heat changes (exothermic or endothermic)
iii) Gas evolved (if any)
iv) Precipitate formed (if any)
2) For example
We can change the equation `Fe_(2)O_(3)+2Al rarr 2Fe+Al_(2)O_(3)` as `Fe_(2)O_(3(s))+2Al_((s)) overset(Delta)rarr 2Fe_((s)) +Al_(2)O_(3(s))`
3) Here we inserted physical state of the substances and heating in the reaction.