AgBr = Br2 + Ag

silver bromide ⟶ bromine + silver

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 Ag and Br: Ag: | c_1 = c_3 Br: | c_1 = 2 c_2 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 = 2 c_2 = 1 c_3 = 2 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | 2 ⟶ + 2

⟶ +

silver bromide ⟶ bromine + silver

| silver bromide | bromine | silver molecular enthalpy | -100 kJ/mol | 0 kJ/mol | 0 kJ/mol total enthalpy | -200 kJ/mol | 0 kJ/mol | 0 kJ/mol | H_initial = -200 kJ/mol | H_final = 0 kJ/mol | ΔH_rxn^0 | 0 kJ/mol - -200 kJ/mol = 200 kJ/mol (endothermic) | |

| silver bromide | bromine | silver molecular entropy | 107 J/(mol K) | 152.2 J/(mol K) | 42.6 J/(mol K) total entropy | 214 J/(mol K) | 152.2 J/(mol K) | 85.2 J/(mol K) | S_initial = 214 J/(mol K) | S_final = 237.4 J/(mol K) | ΔS_rxn^0 | 237.4 J/(mol K) - 214 J/(mol K) = 23.43 J/(mol K) (endoentropic) | |

| silver bromide | bromine | silver Hill formula | AgBr | Br_2 | Ag name | silver bromide | bromine | silver IUPAC name | bromosilver | molecular bromine | silver

| silver bromide | bromine | silver molar mass | 187.77 g/mol | 159.81 g/mol | 107.8682 g/mol phase | solid (at STP) | liquid (at STP) | solid (at STP) melting point | 432 °C | -7.2 °C | 960 °C boiling point | 1300 °C | 58.8 °C | 2212 °C density | 6.473 g/cm^3 | 3.119 g/cm^3 | 10.49 g/cm^3 solubility in water | insoluble | insoluble | insoluble surface tension | | 0.0409 N/m | dynamic viscosity | | 9.44×10^-4 Pa s (at 25 °C) |