Determining the heat of a reaction
Determine the heat of reaction for the oxidation of iron,
4 Fe 9 (s) + 3 O2 ---> 2 Fe2O3 (s)
given the enthalpies of the reactions below.
2 Fe (s) + 6 H20 (l) ---> 2 Fe(OH)3 (s) + 3 H2 (g) change in enthalpy = 321.8 kJ
2 H2 (g) + O2 (g) ----> 2 H2O (l) change in enthalpy = -571.7 kJ
Fe2O3 (s) + 3 H2O (l) ----> 2 Fe(OH)3 (s) change in enthalpy = 288.6 kJ
The answer is -1648.7 kJ, but i don't understand what to do to solve this problem. I need to know what to do starting from the beginning. Thank you for any help.
Ignore the 9 in the very first equation after the 4 Fe. it was a typo
You will use Hess's law to solve this question.Review this topic.