We are asked to calculate ΔHrxn for this reaction.
Note that we need to multiply each ΔH˚f by the stoichiometric coefficient since ΔH˚f is in kJ/mol.
Also, note that ΔH˚f for elements in their standard state is 0.
Dry chemical hand warmers utilize the oxidation of iron to form iron oxide according to the following reaction:
4 Fe(s) + 3O2(g) → 2Fe2O3(s)
Standard thermodynamic quantities for selected substances at 25 o m C
|Reactant or product||ΔH°f (kJ/mol)|
Calculate ΔHrxn for this reaction.
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Enthalpy of Formation concept. You can view video lessons to learn Enthalpy of Formation. Or if you need more Enthalpy of Formation practice, you can also practice Enthalpy of Formation practice problems.