Input interpretation
sulfuric acid ⟶ water + sulfur trioxide
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 H, O and S: H: | 2 c_1 = 2 c_2 O: | 4 c_1 = c_2 + 3 c_3 S: | c_1 = 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 = 1 c_3 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | ⟶ +
Structures
⟶ +
Names
sulfuric acid ⟶ water + sulfur trioxide
Reaction thermodynamics
Gibbs free energy
| sulfuric acid | water | sulfur trioxide molecular free energy | -690 kJ/mol | -237.1 kJ/mol | -373.8 kJ/mol total free energy | -690 kJ/mol | -237.1 kJ/mol | -373.8 kJ/mol | G_initial = -690 kJ/mol | G_final = -610.9 kJ/mol | ΔG_rxn^0 | -610.9 kJ/mol - -690 kJ/mol = 79.1 kJ/mol (endergonic) | |
Chemical names and formulas
| sulfuric acid | water | sulfur trioxide Hill formula | H_2O_4S | H_2O | O_3S name | sulfuric acid | water | sulfur trioxide
Substance properties
| sulfuric acid | water | sulfur trioxide molar mass | 98.07 g/mol | 18.015 g/mol | 80.06 g/mol phase | liquid (at STP) | liquid (at STP) | liquid (at STP) melting point | 10.371 °C | 0 °C | 16.8 °C boiling point | 279.6 °C | 99.9839 °C | 44.7 °C density | 1.8305 g/cm^3 | 1 g/cm^3 | 1.97 g/cm^3 solubility in water | very soluble | | reacts surface tension | 0.0735 N/m | 0.0728 N/m | dynamic viscosity | 0.021 Pa s (at 25 °C) | 8.9×10^-4 Pa s (at 25 °C) | 0.00159 Pa s (at 30 °C) odor | odorless | odorless |
Units
