Input interpretation
hydrogen + silicon dioxide ⟶ water + silicon
Balanced equation
Balance the chemical equation algebraically: + ⟶ + Add stoichiometric coefficients, c_i, to the reactants and products: c_1 + c_2 ⟶ c_3 + c_4 Set the number of atoms in the reactants equal to the number of atoms in the products for H, O and Si: H: | 2 c_1 = 2 c_3 O: | 2 c_2 = c_3 Si: | c_2 = c_4 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 = 2 c_2 = 1 c_3 = 2 c_4 = 1 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | 2 + ⟶ 2 +
Structures
+ ⟶ +
Names
hydrogen + silicon dioxide ⟶ water + silicon
Reaction thermodynamics
Enthalpy
| hydrogen | silicon dioxide | water | silicon molecular enthalpy | 0 kJ/mol | -911 kJ/mol | -285.8 kJ/mol | 0 kJ/mol total enthalpy | 0 kJ/mol | -911 kJ/mol | -571.7 kJ/mol | 0 kJ/mol | H_initial = -911 kJ/mol | | H_final = -571.7 kJ/mol | ΔH_rxn^0 | -571.7 kJ/mol - -911 kJ/mol = 339.3 kJ/mol (endothermic) | | |
Chemical names and formulas
| hydrogen | silicon dioxide | water | silicon Hill formula | H_2 | O_2Si | H_2O | Si name | hydrogen | silicon dioxide | water | silicon IUPAC name | molecular hydrogen | dioxosilane | water | silicon
Substance properties
| hydrogen | silicon dioxide | water | silicon molar mass | 2.016 g/mol | 60.083 g/mol | 18.015 g/mol | 28.085 g/mol phase | gas (at STP) | solid (at STP) | liquid (at STP) | solid (at STP) melting point | -259.2 °C | 1713 °C | 0 °C | 1410 °C boiling point | -252.8 °C | 2950 °C | 99.9839 °C | 2355 °C density | 8.99×10^-5 g/cm^3 (at 0 °C) | 2.196 g/cm^3 | 1 g/cm^3 | 2.33 g/cm^3 solubility in water | | insoluble | | insoluble surface tension | | | 0.0728 N/m | dynamic viscosity | 8.9×10^-6 Pa s (at 25 °C) | | 8.9×10^-4 Pa s (at 25 °C) | odor | odorless | odorless | odorless |
Units
