Input interpretation
zinc + bromine ⟶ zinc bromide
Balanced equation
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 Zn and Br: Zn: | c_1 = c_3 Br: | 2 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 = 1 c_3 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | + ⟶
Structures
+ ⟶
Names
zinc + bromine ⟶ zinc bromide
Reaction thermodynamics
Enthalpy
| zinc | bromine | zinc bromide molecular enthalpy | 0 kJ/mol | 0 kJ/mol | -328.7 kJ/mol total enthalpy | 0 kJ/mol | 0 kJ/mol | -328.7 kJ/mol | H_initial = 0 kJ/mol | | H_final = -328.7 kJ/mol ΔH_rxn^0 | -328.7 kJ/mol - 0 kJ/mol = -328.7 kJ/mol (exothermic) | |
Chemical names and formulas
| zinc | bromine | zinc bromide Hill formula | Zn | Br_2 | Br_2Zn name | zinc | bromine | zinc bromide IUPAC name | zinc | molecular bromine | dibromozinc
Substance properties
| zinc | bromine | zinc bromide molar mass | 65.38 g/mol | 159.81 g/mol | 225.2 g/mol phase | solid (at STP) | liquid (at STP) | solid (at STP) melting point | 420 °C | -7.2 °C | 394 °C boiling point | 907 °C | 58.8 °C | 675 °C density | 7.14 g/cm^3 | 3.119 g/cm^3 | 4.22 g/cm^3 solubility in water | insoluble | insoluble | surface tension | | 0.0409 N/m | dynamic viscosity | | 9.44×10^-4 Pa s (at 25 °C) | odor | odorless | |
Units
