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August 30, 2014

Homework Help: Chemistry

Posted by Glenna on Saturday, October 18, 2008 at 10:36pm.

Hydrogen peroxide, H2O2, is a colorless liquid whose solutions are used as a bleach and an antiseptic. H2O2 can be prepared in a process whose overall change is the following.
H2(g) + O2(g) H2O2(l)

Calculate the enthalpy change using the following data.
H2O2(l) H2O(l) + 1/2 O2(g) H = -98.0 kJ
2 H2(g) + O2(g) 2 H2O(l) H = -571.6 kJ

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