Input interpretation
hydrogen chloride + sodium sulfide ⟶ sodium chloride + hydrogen sulfide
Balanced equation
Balance the chemical equation algebraically: + ⟶ + Add stoichiometric coefficients, c_i, to the reactants and products: c_1 + c_2 ⟶ c_3 + c_4 Set the number of atoms in the reactants equal to the number of atoms in the products for Cl, H, Na and S: Cl: | c_1 = c_3 H: | c_1 = 2 c_4 Na: | 2 c_2 = c_3 S: | c_2 = c_4 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_2 = 1 and solve the system of equations for the remaining coefficients: c_1 = 2 c_2 = 1 c_3 = 2 c_4 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | 2 + ⟶ 2 +
Structures
+ ⟶ +
Names
hydrogen chloride + sodium sulfide ⟶ sodium chloride + hydrogen sulfide
Reaction thermodynamics
Enthalpy
| hydrogen chloride | sodium sulfide | sodium chloride | hydrogen sulfide molecular enthalpy | -92.3 kJ/mol | -364.8 kJ/mol | -411.2 kJ/mol | -20.6 kJ/mol total enthalpy | -184.6 kJ/mol | -364.8 kJ/mol | -822.4 kJ/mol | -20.6 kJ/mol | H_initial = -549.4 kJ/mol | | H_final = -843 kJ/mol | ΔH_rxn^0 | -843 kJ/mol - -549.4 kJ/mol = -293.6 kJ/mol (exothermic) | | |
Gibbs free energy
| hydrogen chloride | sodium sulfide | sodium chloride | hydrogen sulfide molecular free energy | -95.3 kJ/mol | -349.8 kJ/mol | -384.1 kJ/mol | -33.4 kJ/mol total free energy | -190.6 kJ/mol | -349.8 kJ/mol | -768.2 kJ/mol | -33.4 kJ/mol | G_initial = -540.4 kJ/mol | | G_final = -801.6 kJ/mol | ΔG_rxn^0 | -801.6 kJ/mol - -540.4 kJ/mol = -261.2 kJ/mol (exergonic) | | |
Chemical names and formulas
| hydrogen chloride | sodium sulfide | sodium chloride | hydrogen sulfide Hill formula | ClH | Na_2S | ClNa | H_2S name | hydrogen chloride | sodium sulfide | sodium chloride | hydrogen sulfide
Substance properties
| hydrogen chloride | sodium sulfide | sodium chloride | hydrogen sulfide molar mass | 36.46 g/mol | 78.04 g/mol | 58.44 g/mol | 34.08 g/mol phase | gas (at STP) | solid (at STP) | solid (at STP) | gas (at STP) melting point | -114.17 °C | 1172 °C | 801 °C | -85 °C boiling point | -85 °C | | 1413 °C | -60 °C density | 0.00149 g/cm^3 (at 25 °C) | 1.856 g/cm^3 | 2.16 g/cm^3 | 0.001393 g/cm^3 (at 25 °C) solubility in water | miscible | | soluble | dynamic viscosity | | | | 1.239×10^-5 Pa s (at 25 °C) odor | | | odorless |
Units
