Need help understanding the following problems and how to solve them: What's change in enthalpy at 25 degrees Celsius...

Question

Question

Need help understanding the following problems and how to solve them:

What's change in enthalpy at 25 degrees Celsius and 1 atm for the production of 0.345 mol of iron (III) oxide?

4Fe(s)+3O2(g)-> 2Fe2O3(s); ΔH= -1651 kJ

A)-570. kJ
B)-285 kJ
C)-1140 kJ
D)285 kJ
E)570. kJ

2) Given the thermochemical equation
2Al2O3(s) → 4Al(s) + 3O2(g); ΔH = 3352kJ
find ΔHH for the following reaction.
8Al(s) + 6O2(g) → 4Al2O3(s)

a) 838 kJ
b)1676 kJ
c)-6704 kJ
d)1676 kJ
e) 6704 kJ

Answer 1

Answer #1

Yeleased by Ehergy 0-3Ys mele of Fe,os Poduction males of F,o gwe -1651 kJ 0: 345 moles of Fes givo Hiply CYoss O-345 x 165)

Answer 2

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