1.

Balance the following chemical equations and state whether they are exothermic or endothermic : (i) Na+H_(2)O rarr NaOH+H_(2) (ii) FeSO_(4) rarr Fe_(2)O_(3)+SO_(2)+SO_(3)

Answer»

Solution :(i) `2Na+2H_(2)O rarr 2NaOH+H_(2)`
It is an EXOTHERMIC reaction.
(ii) `2FeSO_(4)(S) rarrFe_(2)O_(3)+SO_(2)(G)+SO_(3)(g)`
It is an endothermic reaction.


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