Input interpretation
potassium hydroxide + hydrogen bromide ⟶ water + potassium bromide
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, K, O and Br: H: | c_1 + c_2 = 2 c_3 K: | c_1 = c_4 O: | c_1 = c_3 Br: | 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_1 = 1 and solve the system of equations for the remaining coefficients: c_1 = 1 c_2 = 1 c_3 = 1 c_4 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | + ⟶ +
Structures
+ ⟶ +
Names
potassium hydroxide + hydrogen bromide ⟶ water + potassium bromide
Reaction thermodynamics
Enthalpy
| potassium hydroxide | hydrogen bromide | water | potassium bromide molecular enthalpy | -424.6 kJ/mol | -36.3 kJ/mol | -285.8 kJ/mol | -393.8 kJ/mol total enthalpy | -424.6 kJ/mol | -36.3 kJ/mol | -285.8 kJ/mol | -393.8 kJ/mol | H_initial = -460.9 kJ/mol | | H_final = -679.6 kJ/mol | ΔH_rxn^0 | -679.6 kJ/mol - -460.9 kJ/mol = -218.7 kJ/mol (exothermic) | | |
Gibbs free energy
| potassium hydroxide | hydrogen bromide | water | potassium bromide molecular free energy | -379.4 kJ/mol | -53.4 kJ/mol | -237.1 kJ/mol | -380.7 kJ/mol total free energy | -379.4 kJ/mol | -53.4 kJ/mol | -237.1 kJ/mol | -380.7 kJ/mol | G_initial = -432.8 kJ/mol | | G_final = -617.8 kJ/mol | ΔG_rxn^0 | -617.8 kJ/mol - -432.8 kJ/mol = -185 kJ/mol (exergonic) | | |
Chemical names and formulas
| potassium hydroxide | hydrogen bromide | water | potassium bromide Hill formula | HKO | BrH | H_2O | BrK name | potassium hydroxide | hydrogen bromide | water | potassium bromide
Substance properties
| potassium hydroxide | hydrogen bromide | water | potassium bromide molar mass | 56.105 g/mol | 80.912 g/mol | 18.015 g/mol | 119 g/mol phase | solid (at STP) | gas (at STP) | liquid (at STP) | solid (at STP) melting point | 406 °C | -86.8 °C | 0 °C | 734 °C boiling point | 1327 °C | -66.38 °C | 99.9839 °C | 1435 °C density | 2.044 g/cm^3 | 0.003307 g/cm^3 (at 25 °C) | 1 g/cm^3 | 2.75 g/cm^3 solubility in water | soluble | miscible | | soluble surface tension | | 0.0271 N/m | 0.0728 N/m | dynamic viscosity | 0.001 Pa s (at 550 °C) | 8.4×10^-4 Pa s (at -75 °C) | 8.9×10^-4 Pa s (at 25 °C) | odor | | | odorless |
Units
