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July 23, 2014

Homework Help: Chem

Posted by Ally on Tuesday, July 12, 2011 at 10:58pm.

RXN #1: H2 (g) + O2 (g) --> H2O2 (l) ; delta-H =?
Calculate the enthalpy change (delta-H1) for the reaction above (RXN #1) using the information below and Hess' Law.

RXN A: H2O2 (l) --> H2O (l) + 1/2 O2 (g); delta-H=-98.0 kJ/mol

RXN B: 2 H2 (g) + O2 --> 2 H2O (l); delta-H= -571.8 kJ/mol

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