Input interpretation
water + diborane ⟶ hydrogen + boric acid
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 H, O and B: H: | 2 c_1 + 6 c_2 = 2 c_3 + 3 c_4 O: | c_1 = 3 c_4 B: | 2 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 = 6 c_2 = 1 c_3 = 6 c_4 = 2 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | 6 + ⟶ 6 + 2
Structures
+ ⟶ +
Names
water + diborane ⟶ hydrogen + boric acid
Reaction thermodynamics
Enthalpy
| water | diborane | hydrogen | boric acid molecular enthalpy | -285.8 kJ/mol | 36.4 kJ/mol | 0 kJ/mol | -1094 kJ/mol total enthalpy | -1715 kJ/mol | 36.4 kJ/mol | 0 kJ/mol | -2189 kJ/mol | H_initial = -1679 kJ/mol | | H_final = -2189 kJ/mol | ΔH_rxn^0 | -2189 kJ/mol - -1679 kJ/mol = -510 kJ/mol (exothermic) | | |
Gibbs free energy
| water | diborane | hydrogen | boric acid molecular free energy | -237.1 kJ/mol | 87.6 kJ/mol | 0 kJ/mol | -968.9 kJ/mol total free energy | -1423 kJ/mol | 87.6 kJ/mol | 0 kJ/mol | -1938 kJ/mol | G_initial = -1335 kJ/mol | | G_final = -1938 kJ/mol | ΔG_rxn^0 | -1938 kJ/mol - -1335 kJ/mol = -602.8 kJ/mol (exergonic) | | |
Chemical names and formulas
| water | diborane | hydrogen | boric acid Hill formula | H_2O | B_2H_6 | H_2 | BH_3O_3 name | water | diborane | hydrogen | boric acid IUPAC name | water | diborane | molecular hydrogen | boric acid
Substance properties
| water | diborane | hydrogen | boric acid molar mass | 18.015 g/mol | 27.67 g/mol | 2.016 g/mol | 61.83 g/mol phase | liquid (at STP) | gas (at STP) | gas (at STP) | solid (at STP) melting point | 0 °C | -164.85 °C | -259.2 °C | 160 °C boiling point | 99.9839 °C | -92.5 °C | -252.8 °C | density | 1 g/cm^3 | 0.001131 g/cm^3 (at 25 °C) | 8.99×10^-5 g/cm^3 (at 0 °C) | surface tension | 0.0728 N/m | | | dynamic viscosity | 8.9×10^-4 Pa s (at 25 °C) | | 8.9×10^-6 Pa s (at 25 °C) | odor | odorless | | odorless | odorless
Units
