Input interpretation
oxygen + mercury(II) sulfide ⟶ sulfur dioxide + mercuric oxide
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 O, Hg and S: O: | 2 c_1 = 2 c_3 + c_4 Hg: | c_2 = c_4 S: | c_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_2 = 1 and solve the system of equations for the remaining coefficients: c_1 = 3/2 c_2 = 1 c_3 = 1 c_4 = 1 Multiply by the least common denominator, 2, to eliminate fractional coefficients: c_1 = 3 c_2 = 2 c_3 = 2 c_4 = 2 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | 3 + 2 ⟶ 2 + 2
Structures
+ ⟶ +
Names
oxygen + mercury(II) sulfide ⟶ sulfur dioxide + mercuric oxide
Reaction thermodynamics
Enthalpy
| oxygen | mercury(II) sulfide | sulfur dioxide | mercuric oxide molecular enthalpy | 0 kJ/mol | -58.2 kJ/mol | -296.8 kJ/mol | -90 kJ/mol total enthalpy | 0 kJ/mol | -116.4 kJ/mol | -593.6 kJ/mol | -180 kJ/mol | H_initial = -116.4 kJ/mol | | H_final = -773.6 kJ/mol | ΔH_rxn^0 | -773.6 kJ/mol - -116.4 kJ/mol = -657.2 kJ/mol (exothermic) | | |
Gibbs free energy
| oxygen | mercury(II) sulfide | sulfur dioxide | mercuric oxide molecular free energy | 231.7 kJ/mol | -50.6 kJ/mol | -300.1 kJ/mol | -59 kJ/mol total free energy | 695.1 kJ/mol | -101.2 kJ/mol | -600.2 kJ/mol | -118 kJ/mol | G_initial = 593.9 kJ/mol | | G_final = -718.2 kJ/mol | ΔG_rxn^0 | -718.2 kJ/mol - 593.9 kJ/mol = -1312 kJ/mol (exergonic) | | |
Chemical names and formulas
| oxygen | mercury(II) sulfide | sulfur dioxide | mercuric oxide Hill formula | O_2 | HgS | O_2S | HgO name | oxygen | mercury(II) sulfide | sulfur dioxide | mercuric oxide IUPAC name | molecular oxygen | thioxomercury | sulfur dioxide | oxomercury
Substance properties
| oxygen | mercury(II) sulfide | sulfur dioxide | mercuric oxide molar mass | 31.998 g/mol | 232.65 g/mol | 64.06 g/mol | 216.591 g/mol phase | gas (at STP) | solid (at STP) | gas (at STP) | solid (at STP) melting point | -218 °C | 583.5 °C | -73 °C | 500 °C boiling point | -183 °C | | -10 °C | density | 0.001429 g/cm^3 (at 0 °C) | 8.1 g/cm^3 | 0.002619 g/cm^3 (at 25 °C) | 11.14 g/cm^3 solubility in water | | insoluble | | insoluble surface tension | 0.01347 N/m | | 0.02859 N/m | dynamic viscosity | 2.055×10^-5 Pa s (at 25 °C) | | 1.282×10^-5 Pa s (at 25 °C) | odor | odorless | | | odorless
Units
