Input interpretation
aluminum + hydrogen bromide ⟶ hydrogen + aluminum tribromide
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 Al, Br and H: Al: | c_1 = c_4 Br: | c_2 = 3 c_4 H: | 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 = 3 c_3 = 3/2 c_4 = 1 Multiply by the least common denominator, 2, to eliminate fractional coefficients: c_1 = 2 c_2 = 6 c_3 = 3 c_4 = 2 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | 2 + 6 ⟶ 3 + 2
Structures
+ ⟶ +
Names
aluminum + hydrogen bromide ⟶ hydrogen + aluminum tribromide
Reaction thermodynamics
Enthalpy
| aluminum | hydrogen bromide | hydrogen | aluminum tribromide molecular enthalpy | 0 kJ/mol | -36.3 kJ/mol | 0 kJ/mol | -527.2 kJ/mol total enthalpy | 0 kJ/mol | -217.8 kJ/mol | 0 kJ/mol | -1054 kJ/mol | H_initial = -217.8 kJ/mol | | H_final = -1054 kJ/mol | ΔH_rxn^0 | -1054 kJ/mol - -217.8 kJ/mol = -836.6 kJ/mol (exothermic) | | |
Chemical names and formulas
| aluminum | hydrogen bromide | hydrogen | aluminum tribromide Hill formula | Al | BrH | H_2 | AlBr_3 name | aluminum | hydrogen bromide | hydrogen | aluminum tribromide IUPAC name | aluminum | hydrogen bromide | molecular hydrogen | tribromoalumane
Substance properties
| aluminum | hydrogen bromide | hydrogen | aluminum tribromide molar mass | 26.9815385 g/mol | 80.912 g/mol | 2.016 g/mol | 266.69 g/mol phase | solid (at STP) | gas (at STP) | gas (at STP) | solid (at STP) melting point | 660.4 °C | -86.8 °C | -259.2 °C | 96 °C boiling point | 2460 °C | -66.38 °C | -252.8 °C | 265 °C density | 2.7 g/cm^3 | 0.003307 g/cm^3 (at 25 °C) | 8.99×10^-5 g/cm^3 (at 0 °C) | 3.205 g/cm^3 solubility in water | insoluble | miscible | | reacts surface tension | 0.817 N/m | 0.0271 N/m | | dynamic viscosity | 1.5×10^-4 Pa s (at 760 °C) | 8.4×10^-4 Pa s (at -75 °C) | 8.9×10^-6 Pa s (at 25 °C) | odor | odorless | | odorless |
Units
