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El perxido de hidrgeno puede descomponerse en agua y oxgeno por la reaccin: _ H2O2 (l) __ H2O (l) + __ O2 (g) Hrxn =

El perxido de hidrgeno puede descomponerse en agua y oxgeno por la reaccin: _ H2O2 (l) __ H2O (l) + __ O2 (g) Hrxn = -196 kJ

a. Equilibre la reaccin qumica anterior

b. La reaccin es endotrmica o exotrmica? ___________

C. Cuando 4.50 g de H2O2 se descomponen a presin constante, cunto vale q?

d. Si la reaccin del perxido de hidrgeno tiene lugar a presin constante, se realiza algn trabajo?

mi. Si se descomponen 45,0 g de perxido de hidrgeno y el gas O2 resultante se recoge en un recipiente de 5 L a una temperatura de 285 K, cul es la presin dentro del recipiente despus de la reaccin? Masas molares: H2O2 = 34,02 g/mol O2 = 32,00 g/mol H2O = 18,02 g/mol

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