How can I find the amount of heat released in an enthalpy reaction?

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SUMMARY

The discussion focuses on calculating the heat released during an enthalpy reaction involving iron and oxygen, specifically the reaction 4 Fe(s) + 3 O2(g) → 2 Fe2O3(s) with a ΔH of -1652 kJ. To determine the heat released when 4.68 moles of iron are reacted, a conversion factor is established: 4 moles of Fe corresponds to -1652 kJ. Using this relationship, the heat released can be calculated by setting up the proportion: (4.68 mol Fe) x (-1652 kJ / 4 mol Fe).

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viper2308
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Hi, new to the forum.

I need help on how to find out how much heat is released in an enthalpy reaction.

The problem is: 4 Fe(s) + 3 O2(g) 2 Fe2O3(s) Delta H = -1652 kJ
(a) How much heat is released when 4.68 mol iron is reacted with excess O2?
 
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make a conversion factor (aka as unit factor) out of your equation

4 moles of Fe = -1652 kJ

4.68 mol of Fe = x kJ
 

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