🧪 TheChemSolverUSNCO / General Chemistry
ThermodynamicsMCQ

Calculate the energy released by the reaction 4 Fe(s) + 3 O2(g) → 2 Fe2O3(s) when a 55.8 g sample ofThermodynamics Chemistry Question

Question

Calculate the energy released by the reaction
4 Fe(s) + 3 O2(g) → 2 Fe2O3(s)
when a 55.8 g sample of iron reacts completely with 1.00 mole of oxygen. The enthalpy of formation (∆Hf˚) of Fe2O3(s) is –826 kJ•mol–1.

A.

206 kJ

B.

413 kJ

✓ Correct
C.

826 kJ

D.

1650 kJ

💬
Still have doubts about this question?
Practice more questions like this, completely free.

Practice USNCO / General Chemistry questions like this — free

4,000+ questions across AP Chemistry, USNCO, and IChO — all free, no signup required.