Input interpretation
iron(II, III) oxide ⟶ oxygen + iron
Balanced equation
Balance the chemical equation algebraically: ⟶ + Add stoichiometric coefficients, c_i, to the reactants and products: c_1 ⟶ c_2 + c_3 Set the number of atoms in the reactants equal to the number of atoms in the products for Fe and O: Fe: | 3 c_1 = c_3 O: | 4 c_1 = 2 c_2 Since the coefficients are relative quantities and underdetermined, choose a coefficient to set arbitrarily. To keep the coefficients small, the arbitrary value is ordinarily one. For instance, set c_1 = 1 and solve the system of equations for the remaining coefficients: c_1 = 1 c_2 = 2 c_3 = 3 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | ⟶ 2 + 3
Structures
⟶ +
Names
iron(II, III) oxide ⟶ oxygen + iron
Reaction thermodynamics
Enthalpy
| iron(II, III) oxide | oxygen | iron molecular enthalpy | -1118 kJ/mol | 0 kJ/mol | 0 kJ/mol total enthalpy | -1118 kJ/mol | 0 kJ/mol | 0 kJ/mol | H_initial = -1118 kJ/mol | H_final = 0 kJ/mol | ΔH_rxn^0 | 0 kJ/mol - -1118 kJ/mol = 1118 kJ/mol (endothermic) | |
Chemical names and formulas
| iron(II, III) oxide | oxygen | iron Hill formula | Fe_3O_4 | O_2 | Fe name | iron(II, III) oxide | oxygen | iron IUPAC name | | molecular oxygen | iron
Substance properties
| iron(II, III) oxide | oxygen | iron molar mass | 231.53 g/mol | 31.998 g/mol | 55.845 g/mol phase | solid (at STP) | gas (at STP) | solid (at STP) melting point | 1538 °C | -218 °C | 1535 °C boiling point | | -183 °C | 2750 °C density | 5 g/cm^3 | 0.001429 g/cm^3 (at 0 °C) | 7.874 g/cm^3 solubility in water | | | insoluble surface tension | | 0.01347 N/m | dynamic viscosity | | 2.055×10^-5 Pa s (at 25 °C) | odor | | odorless |
Units
