Search

Br2 + NaI = I2 + NaBr

Input interpretation

bromine + sodium iodide ⟶ iodine + sodium bromide
bromine + sodium iodide ⟶ iodine + sodium 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 Br, I and Na: Br: | 2 c_1 = c_4 I: | c_2 = 2 c_3 Na: | 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 = 2 c_3 = 1 c_4 = 2 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | + 2 ⟶ + 2
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 Br, I and Na: Br: | 2 c_1 = c_4 I: | c_2 = 2 c_3 Na: | 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 = 2 c_3 = 1 c_4 = 2 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | + 2 ⟶ + 2

Structures

+ ⟶ +
+ ⟶ +

Names

bromine + sodium iodide ⟶ iodine + sodium bromide
bromine + sodium iodide ⟶ iodine + sodium bromide

Reaction thermodynamics

Enthalpy

| bromine | sodium iodide | iodine | sodium bromide molecular enthalpy | 0 kJ/mol | -287.8 kJ/mol | 0 kJ/mol | -361.1 kJ/mol total enthalpy | 0 kJ/mol | -575.6 kJ/mol | 0 kJ/mol | -722.2 kJ/mol | H_initial = -575.6 kJ/mol | | H_final = -722.2 kJ/mol | ΔH_rxn^0 | -722.2 kJ/mol - -575.6 kJ/mol = -146.6 kJ/mol (exothermic) | | |
| bromine | sodium iodide | iodine | sodium bromide molecular enthalpy | 0 kJ/mol | -287.8 kJ/mol | 0 kJ/mol | -361.1 kJ/mol total enthalpy | 0 kJ/mol | -575.6 kJ/mol | 0 kJ/mol | -722.2 kJ/mol | H_initial = -575.6 kJ/mol | | H_final = -722.2 kJ/mol | ΔH_rxn^0 | -722.2 kJ/mol - -575.6 kJ/mol = -146.6 kJ/mol (exothermic) | | |

Gibbs free energy

| bromine | sodium iodide | iodine | sodium bromide molecular free energy | 0 kJ/mol | -286.1 kJ/mol | 0 kJ/mol | -349 kJ/mol total free energy | 0 kJ/mol | -572.2 kJ/mol | 0 kJ/mol | -698 kJ/mol | G_initial = -572.2 kJ/mol | | G_final = -698 kJ/mol | ΔG_rxn^0 | -698 kJ/mol - -572.2 kJ/mol = -125.8 kJ/mol (exergonic) | | |
| bromine | sodium iodide | iodine | sodium bromide molecular free energy | 0 kJ/mol | -286.1 kJ/mol | 0 kJ/mol | -349 kJ/mol total free energy | 0 kJ/mol | -572.2 kJ/mol | 0 kJ/mol | -698 kJ/mol | G_initial = -572.2 kJ/mol | | G_final = -698 kJ/mol | ΔG_rxn^0 | -698 kJ/mol - -572.2 kJ/mol = -125.8 kJ/mol (exergonic) | | |

Entropy

| bromine | sodium iodide | iodine | sodium bromide molecular entropy | 152.2 J/(mol K) | 91 J/(mol K) | 116.1 J/(mol K) | 84 J/(mol K) total entropy | 152.2 J/(mol K) | 182 J/(mol K) | 116.1 J/(mol K) | 168 J/(mol K) | S_initial = 334.2 J/(mol K) | | S_final = 284.1 J/(mol K) | ΔS_rxn^0 | 284.1 J/(mol K) - 334.2 J/(mol K) = -50.1 J/(mol K) (exoentropic) | | |
| bromine | sodium iodide | iodine | sodium bromide molecular entropy | 152.2 J/(mol K) | 91 J/(mol K) | 116.1 J/(mol K) | 84 J/(mol K) total entropy | 152.2 J/(mol K) | 182 J/(mol K) | 116.1 J/(mol K) | 168 J/(mol K) | S_initial = 334.2 J/(mol K) | | S_final = 284.1 J/(mol K) | ΔS_rxn^0 | 284.1 J/(mol K) - 334.2 J/(mol K) = -50.1 J/(mol K) (exoentropic) | | |

Equilibrium constant

K_c = ([I2] [NaBr]^2)/([Br2] [NaI]^2)
K_c = ([I2] [NaBr]^2)/([Br2] [NaI]^2)

Rate of reaction

rate = -(Δ[Br2])/(Δt) = -1/2 (Δ[NaI])/(Δt) = (Δ[I2])/(Δt) = 1/2 (Δ[NaBr])/(Δt) (assuming constant volume and no accumulation of intermediates or side products)
rate = -(Δ[Br2])/(Δt) = -1/2 (Δ[NaI])/(Δt) = (Δ[I2])/(Δt) = 1/2 (Δ[NaBr])/(Δt) (assuming constant volume and no accumulation of intermediates or side products)

Chemical names and formulas

| bromine | sodium iodide | iodine | sodium bromide Hill formula | Br_2 | INa | I_2 | BrNa name | bromine | sodium iodide | iodine | sodium bromide IUPAC name | molecular bromine | sodium iodide | molecular iodine | sodium bromide
| bromine | sodium iodide | iodine | sodium bromide Hill formula | Br_2 | INa | I_2 | BrNa name | bromine | sodium iodide | iodine | sodium bromide IUPAC name | molecular bromine | sodium iodide | molecular iodine | sodium bromide

Substance properties

| bromine | sodium iodide | iodine | sodium bromide molar mass | 159.81 g/mol | 149.89424 g/mol | 253.80894 g/mol | 102.89 g/mol phase | liquid (at STP) | solid (at STP) | solid (at STP) | solid (at STP) melting point | -7.2 °C | 661 °C | 113 °C | 755 °C boiling point | 58.8 °C | 1300 °C | 184 °C | 1396 °C density | 3.119 g/cm^3 | 3.67 g/cm^3 | 4.94 g/cm^3 | 3.2 g/cm^3 solubility in water | insoluble | | | soluble surface tension | 0.0409 N/m | | | dynamic viscosity | 9.44×10^-4 Pa s (at 25 °C) | 0.0010446 Pa s (at 691 °C) | 0.00227 Pa s (at 116 °C) |
| bromine | sodium iodide | iodine | sodium bromide molar mass | 159.81 g/mol | 149.89424 g/mol | 253.80894 g/mol | 102.89 g/mol phase | liquid (at STP) | solid (at STP) | solid (at STP) | solid (at STP) melting point | -7.2 °C | 661 °C | 113 °C | 755 °C boiling point | 58.8 °C | 1300 °C | 184 °C | 1396 °C density | 3.119 g/cm^3 | 3.67 g/cm^3 | 4.94 g/cm^3 | 3.2 g/cm^3 solubility in water | insoluble | | | soluble surface tension | 0.0409 N/m | | | dynamic viscosity | 9.44×10^-4 Pa s (at 25 °C) | 0.0010446 Pa s (at 691 °C) | 0.00227 Pa s (at 116 °C) |

Units

Random Queries

InChI identifier of potassium chloride vs rubidium nitrate
alternate names of ammonium iodide vs iodo(trimethylphosphite)copper(I)
IUPAC name of 1-bromotridecane-1,1,2,2-d 4 vs 4-bromoheptane
name of copper vs sulfuric acid
chemical types of rubidium hydroxide vs sulfuric acid
most recent price of ferromagnetic elements
absolute melting point of alkaline earth metals
formula of silver telluride vs nickel(II) ammonium chloride hexahydrate
thiolate functional group
chemical types of 3-(2-dodecenyl)succinic anhydride