Standard Thermodynamic Properties of Chemical Substances

This table gives the standard state thermodynamic properties of a number of substances in the crystalline, liquid, and gaseous states. Substances are listed by molecular formula The properties tabulated are  

AfH Standard molar enthalpy of formation at 298.15 K in kJ/mol AfG Standard molar Gibbs energy of formation at 298.15 K in kJ/mol S Standard molar entropy at 298.15 K in J/mol K Cp Molar heat capacity at constant pressure at 298.15 K in J/mol K 

The standard state pressure is 100 kPa (1 bar). The standard states are defined for different phases by  

An entry of 0.0 for AfH° for an element indicates the reference state of that elanent A blank means no value is available. 

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Standard Thermodynamic Properties of Chemical Substances, CRC Press LLC, 2000. 

This table contains standard state thermodynamic properties of positive and negative ions in aqueous solution. It includes en-thcdpy and Gibbs energy of formation, entropy, and heat capacity, and thus serves as a companion to the preceding table, Standard Thermodynamic Properties of Chemical Substances . The standard state is the hypothetical ideal solution with molality m = 1 mol/kg (mean ionic molality in the case of a species which is assumed to dissociate at infinite dilution). Further details on conventions may be found in Reference 1. 

The heat of combustion of a substance at 25°C can be calculated from the enthalpy of formation (AjW°) data in the table Standard Thermodynamic Properties of Chemical Substances in this Section. We can write the general combustion reaction as... 

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