+3 votes
in Class 11 by kratos

Will the heat released in the following two reactions be equal? Give reasons in support of your answer.

(i) H2(g) +1/2 O2 (g) H2O(g)

(ii) H2(g) +1/2 O2 (g) H2O(l)

1 Answer

+1 vote
by kratos
 
Best answer

No, the heats released in the two reactions are not equal. The heat released in any reaction depends upon the reactants, products and their physical states. Here in reaction (i), the water produced is in the gaseous state whereas in reaction (ii) liquid is formed. As we know, that when water vapors condensed to from water, heat equal to the latent heat of vaporization is released. Thus, more heat is released in reaction (ii).

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