Reaction Thermodynamics for Pc

1. Scrolling to the required formula and pressing run button initiates calculation according to the formula and set results in the appropriate fields ((dG°, dH°, dS°, Keq, dG, dH, dS, Keq2) and in the fields for standard parameters.

2. Important!!! If compound doesn't participate in equilibrium calculation (like in case of water in water solution or solid in gas phase reaction) please set concentration of the compound to 1 or set its stoichiometric coefficient to 0 (depends on case) to ensure proper Quotient calculations.

3. Reaction stoichiometric parameters and concentration/pressure units can be changed by pressing the corresponding fields.

4. - Standard free Gibbs energy, enthalpy and entropy from formation energy parameters.

5. - Non standard energy parameters (dG, dH, dS) from standard ones, quotient and temperature.

6. Reaction Thermodynamics helps in evaluation of main thermodynamic parameters of a chemical reaction.

7. - Van't Hoff relation to follow change in equilibrium constant with temperature assuming constant reaction enthalpy.

8. If formation parameters are unknown, the standard parameters can be filled in directly.

9. Keq units depend on reaction stoichiometry and may be unitless or any mixture of Molar and atm.

10. - Reaction quotient (Q) from concentrations, pressures and reaction stoichiometry.

11. Please pay attention to the parameters needed for solution of the formulas.

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