Input interpretation
oxygen + potassium ⟶ potassium peroxide
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 K: O: | 2 c_1 = 2 c_3 K: | 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 = 2 c_3 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | + 2 ⟶
Structures
+ ⟶
Names
oxygen + potassium ⟶ potassium peroxide
Reaction thermodynamics
Entropy
| oxygen | potassium | potassium peroxide molecular entropy | 205 J/(mol K) | 64 J/(mol K) | 113 J/(mol K) total entropy | 205 J/(mol K) | 128 J/(mol K) | 113 J/(mol K) | S_initial = 333 J/(mol K) | | S_final = 113 J/(mol K) ΔS_rxn^0 | 113 J/(mol K) - 333 J/(mol K) = -220 J/(mol K) (exoentropic) | |
Chemical names and formulas
| oxygen | potassium | potassium peroxide Hill formula | O_2 | K | K_2O_2 name | oxygen | potassium | potassium peroxide IUPAC name | molecular oxygen | potassium | dipotassium peroxide
Substance properties
| oxygen | potassium | potassium peroxide molar mass | 31.998 g/mol | 39.0983 g/mol | 110.19 g/mol phase | gas (at STP) | solid (at STP) | solid (at STP) melting point | -218 °C | 64 °C | 490 °C boiling point | -183 °C | 760 °C | density | 0.001429 g/cm^3 (at 0 °C) | 0.86 g/cm^3 | 1 g/cm^3 solubility in water | | reacts | reacts surface tension | 0.01347 N/m | | dynamic viscosity | 2.055×10^-5 Pa s (at 25 °C) | | odor | odorless | |
Units
