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July 6, 2015

Homework Help: chemistry

Posted by tanisha on Wednesday, March 26, 2008 at 10:08pm.

Given:
*Fe2O3(s)+3CO(s)-->2Fe(s)+3CO2(g)(delta h is -23kJ)
*3Fe2O3(s)+CO(g)-->2Fe3O4(s)+CO2(g)(delta h is -39kJ)
*Fe3O4(s)+CO(g)-->3FeO(s)+CO2 (delta h is 18kJ)
Desired:FeO(s)+CO(g)-->Fe(s)+CO2(g)
find delta h for the desired reaction.

which reactions do i reverse and then how do i cancel the out the ones i dont need?

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