Input interpretation
iron + iron(III) chloride ⟶ iron(II) chloride
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 Cl: Fe: | c_1 + c_2 = c_3 Cl: | 3 c_2 = 2 c_3 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 + iron(III) chloride ⟶ iron(II) chloride
Reaction thermodynamics
Enthalpy
| iron | iron(III) chloride | iron(II) chloride molecular enthalpy | 0 kJ/mol | -399.5 kJ/mol | -341.8 kJ/mol total enthalpy | 0 kJ/mol | -799 kJ/mol | -1025 kJ/mol | H_initial = -799 kJ/mol | | H_final = -1025 kJ/mol ΔH_rxn^0 | -1025 kJ/mol - -799 kJ/mol = -226.4 kJ/mol (exothermic) | |
Chemical names and formulas
| iron | iron(III) chloride | iron(II) chloride Hill formula | Fe | Cl_3Fe | Cl_2Fe name | iron | iron(III) chloride | iron(II) chloride IUPAC name | iron | trichloroiron | dichloroiron
Substance properties
| iron | iron(III) chloride | iron(II) chloride molar mass | 55.845 g/mol | 162.2 g/mol | 126.7 g/mol phase | solid (at STP) | solid (at STP) | solid (at STP) melting point | 1535 °C | 304 °C | 677 °C boiling point | 2750 °C | | density | 7.874 g/cm^3 | | 3.16 g/cm^3 solubility in water | insoluble | |
Units
