Input interpretation
oxygen + nitrogen ⟶ dinitrogen pentoxide
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 O and N: O: | 2 c_1 = 5 c_3 N: | 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_2 = 1 and solve the system of equations for the remaining coefficients: c_1 = 5/2 c_2 = 1 c_3 = 1 Multiply by the least common denominator, 2, to eliminate fractional coefficients: c_1 = 5 c_2 = 2 c_3 = 2 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | 5 + 2 ⟶ 2
Structures
+ ⟶
Names
oxygen + nitrogen ⟶ dinitrogen pentoxide
Reaction thermodynamics
Enthalpy
| oxygen | nitrogen | dinitrogen pentoxide molecular enthalpy | 0 kJ/mol | 0 kJ/mol | -43.1 kJ/mol total enthalpy | 0 kJ/mol | 0 kJ/mol | -86.2 kJ/mol | H_initial = 0 kJ/mol | | H_final = -86.2 kJ/mol ΔH_rxn^0 | -86.2 kJ/mol - 0 kJ/mol = -86.2 kJ/mol (exothermic) | |
Gibbs free energy
| oxygen | nitrogen | dinitrogen pentoxide molecular free energy | 231.7 kJ/mol | 0 kJ/mol | 113.9 kJ/mol total free energy | 1159 kJ/mol | 0 kJ/mol | 227.8 kJ/mol | G_initial = 1159 kJ/mol | | G_final = 227.8 kJ/mol ΔG_rxn^0 | 227.8 kJ/mol - 1159 kJ/mol = -930.7 kJ/mol (exergonic) | |
Entropy
| oxygen | nitrogen | dinitrogen pentoxide molecular entropy | 205 J/(mol K) | 192 J/(mol K) | 178 J/(mol K) total entropy | 1025 J/(mol K) | 384 J/(mol K) | 356 J/(mol K) | S_initial = 1409 J/(mol K) | | S_final = 356 J/(mol K) ΔS_rxn^0 | 356 J/(mol K) - 1409 J/(mol K) = -1053 J/(mol K) (exoentropic) | |
Chemical names and formulas
| oxygen | nitrogen | dinitrogen pentoxide Hill formula | O_2 | N_2 | N_2O_5 name | oxygen | nitrogen | dinitrogen pentoxide IUPAC name | molecular oxygen | molecular nitrogen | nitro nitrate
Substance properties
| oxygen | nitrogen | dinitrogen pentoxide molar mass | 31.998 g/mol | 28.014 g/mol | 108.01 g/mol phase | gas (at STP) | gas (at STP) | solid (at STP) melting point | -218 °C | -210 °C | 30 °C boiling point | -183 °C | -195.79 °C | 47 °C density | 0.001429 g/cm^3 (at 0 °C) | 0.001251 g/cm^3 (at 0 °C) | 2.05 g/cm^3 solubility in water | | insoluble | surface tension | 0.01347 N/m | 0.0066 N/m | dynamic viscosity | 2.055×10^-5 Pa s (at 25 °C) | 1.78×10^-5 Pa s (at 25 °C) | odor | odorless | odorless |
Units
