Chemical Forums
Chemistry Forums for Students => High School Chemistry Forum => Topic started by: kenny122 on November 11, 2007, 03:51:41 PM
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can't figure this one out either. ???
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acid - base reaction
or you can think of it like a double replacement/metathesis reaction
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ok, so i got Fe2O3+3HCL=Fe2Cl3+3OH
now the problem becomes...i need to calculate the molar heat of formation of Fe203, without looking cheating and using the table. and then once i get my own value, i have to calculate the percentage error. now i'm seriously stuck. i have a whole series of questions if that would help.but i have figured out pretty much everything but this one little question.
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ok, so i got Fe2O3+3HCL=Fe2Cl3+3OH
now the problem becomes...i need to calculate the molar heat of formation of Fe203, without looking cheating and using the table. and then once i get my own value, i have to calculate the percentage error. now i'm seriously stuck. i have a whole series of questions if that would help.but i have figured out pretty much everything but this one little question.
OH is not a product, what do you get when you put together O2- and H+? acid and a base give ?
Hess's Law
sum of the heats of the products - sum of the heats of the reactants = heat of reaction
you need the heats of formation of HCl, FeCl3 and the other and the heat of reaction to get heat of Fe2O3