Input interpretation
bromine + calcium ⟶ calcium 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 Br and Ca: Br: | 2 c_1 = 2 c_3 Ca: | c_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
bromine + calcium ⟶ calcium bromide
Reaction thermodynamics
Enthalpy
| bromine | calcium | calcium bromide molecular enthalpy | 0 kJ/mol | 0 kJ/mol | -682.8 kJ/mol total enthalpy | 0 kJ/mol | 0 kJ/mol | -682.8 kJ/mol | H_initial = 0 kJ/mol | | H_final = -682.8 kJ/mol ΔH_rxn^0 | -682.8 kJ/mol - 0 kJ/mol = -682.8 kJ/mol (exothermic) | |
Chemical names and formulas
| bromine | calcium | calcium bromide Hill formula | Br_2 | Ca | Br_2Ca name | bromine | calcium | calcium bromide IUPAC name | molecular bromine | calcium | calcium dibromide
Substance properties
| bromine | calcium | calcium bromide molar mass | 159.81 g/mol | 40.078 g/mol | 199.89 g/mol phase | liquid (at STP) | solid (at STP) | solid (at STP) melting point | -7.2 °C | 850 °C | 730 °C boiling point | 58.8 °C | 1484 °C | 810 °C density | 3.119 g/cm^3 | 1.54 g/cm^3 | 3.353 g/cm^3 solubility in water | insoluble | decomposes | soluble surface tension | 0.0409 N/m | | dynamic viscosity | 9.44×10^-4 Pa s (at 25 °C) | |
Units
