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Exercício de Cinética Química

por Juliano Medeiros (UFRGS ) Difícil Saturday, August 30th, 2014


21. A decomposição do peróxido de hidrogênio tem k = 0,0410 min-1 e segue a reação: 2 H2O2 (aq) → 2 H2O (l) + O2 (g)

a) esta reação pode ocorrer em uma única etapa? Justifique.

b) se a concentração inicial de H2O2 for 0,40 mol/L, qual será a sua concentração após 10 minutos?

c) em quanto tempo a concentração de H2O2 cairá de 0,40 mol/L para 0,10 mol/L?

d) se a concentração inicial de H2O2 for de 0,40 mol/L, quanto tempo é necessário  para a concentração de H2O2 decrescer de duas meias-vidas?

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