Homework Help: Chem

Posted by Lindsey on Thursday, November 19, 2009 at 4:29pm.

Hydrogen peroxide decomposes according to the following:
H2O2--> H2O(l) + 1/2O2(g); deltaH = -98.2kJ
Calculate the change in enthalpy, deltaH, when 1.00g of Hydrogen peroxide decomposes

Chem - DrBob222, Thursday, November 19, 2009 at 6:27pm
98.2 kJ is released for 1 mole H2O2 (and 1 mole is 34 g approximately. You can do it exactly.) Now, how much of a mole is 1 g H2O2? So 98.2 kJ x (1 g/34 g) = ?? kJ energy released for 1 g Hydrogen.

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