Calculate the ΔH for the following reaction: 3 Fe + 4 H2O → Fe3O4 + 4 H2
Given the following information:
FeO + H2 → Fe + H2O ΔH = +25 kJ
3 FeO + ½ O2 → Fe3O4 ΔH = -318 kJ
H2 + ½ O2 → H2O ΔH = -242 kJ

Water is initially present in a state where its molecules are far apart. during a change of state, its molecules slow down. which change of state has most likely taken place? from a gas to a liquid from a liquid to a gas from a solid to a liquid from a gas to a plasma