Section 6. Thermodynamic Properties.pdf

Section 6. Thermodynamic Properties DEAN #37261 (McGHP) RIGHT INTERACTIVE
top of page
SECTION 6
THERMODYNAMIC PROPERTIES
ENTHALPIES AND GIBBS ENERGIES OF FORMATION, ENTROPIES, AND
HEAT CAPACITIES
Some Thermodynamic Relations
Table Enthalpies and Gibbs Energies of Formation, Entropies, and Heat
Capacities pounds
Table Heats of Fusion, Vaporization, and Sublimation and Specific Heat at
Various Temperatures pounds
Table Enthalpies and Gibbs Energies of Formation, Entropies, and Heat
Capacities of the Elements and pounds
Table Heats of Fusion, Vaporization, and Sublimation and Specific Heat at
Various Temperatures of the Elements and pounds
CRITICAL PHENOMENA
Table Critical Properties
ENTHALPIES AND GIBBS ENERGIES OF
FORMATION, ENTROPIES, AND HEAT
CAPACITIES
The tables in this section contain values of the enthalpy and Gibbs energy of formation, entropy,
and heat capacity at K (25ЊC). No values are given in these tables for metal alloys or other
solid solutions, for fused salts, or for substances of undefined position.
The physical state of each substance is indicated in the column headed “State” as crystalline solid
(c), liquid (lq), or gaseous (g). Solutions in water are listed as aqueous (aq).
The values of the thermodynamic properties of the pure substances given in these tables are, for
the substances in their standard states, defined as follows: For a pure solid or liquid, the standard
state is the substance in the condensed phase under a pressure of 1 atm (101 325 Pa). For a gas, the
standard state is the hypothetical ideal gas at unit fugacity, in which state the enthalpy is that of the
real gas at the same temperature and at zero pressure.
⌬Њ⌬Њ
The values of f H and f G that are given in the tables represent the change in the appropriate
thermodynamic quantity when one mole of the substance in its standard state is formed, isothermally
at the indicated temperatur