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

[viper2308]

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?

 

[eli64]

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