Input interpretation
aluminum + red phosphorus ⟶ aluminum phosphide
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 Al and P: Al: | c_1 = c_3 P: | 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
aluminum + red phosphorus ⟶ aluminum phosphide
Reaction thermodynamics
Enthalpy
| aluminum | red phosphorus | aluminum phosphide molecular enthalpy | 0 kJ/mol | -17.6 kJ/mol | -166.5 kJ/mol total enthalpy | 0 kJ/mol | -17.6 kJ/mol | -166.5 kJ/mol | H_initial = -17.6 kJ/mol | | H_final = -166.5 kJ/mol ΔH_rxn^0 | -166.5 kJ/mol - -17.6 kJ/mol = -148.9 kJ/mol (exothermic) | |
Chemical names and formulas
| aluminum | red phosphorus | aluminum phosphide Hill formula | Al | P | AlP name | aluminum | red phosphorus | aluminum phosphide IUPAC name | aluminum | phosphorus | alumanylidynephosphane
Substance properties
| aluminum | red phosphorus | aluminum phosphide molar mass | 26.9815385 g/mol | 30.973761998 g/mol | 57.9553005 g/mol phase | solid (at STP) | solid (at STP) | solid (at STP) melting point | 660.4 °C | 579.2 °C | 2530 °C boiling point | 2460 °C | | density | 2.7 g/cm^3 | 2.16 g/cm^3 | 2.85 g/cm^3 solubility in water | insoluble | insoluble | reacts surface tension | 0.817 N/m | | dynamic viscosity | 1.5×10^-4 Pa s (at 760 °C) | 7.6×10^-4 Pa s (at 20.2 °C) | odor | odorless | |
Units
