Enthalpy, defined

As with other state functions, the molar enthalpy defined by H... 

The heat absorbed or evolved when liquids or solutions are mixed or diluted is obtained from the calculation of AH for the solution process.kk The calculation of AH is usually obtained from the relative partial molar enthalpy defined as... 

AZ/hydniioii hydration enthalpy defined as change in enthalpy from hypothetical com-... 

Internal energy (through the enthalpy, defined in Sec. 2.5) is useful for the calculation of heat and work quantities for such equipment as heat exchangers, evaporators, distillation columns, pumps, compressors, turbines, engines, etc., because it is a state function. The tabulation of all possible Q s and W s for all possible processes is impossible. But the intensive state functions, such as specific volume and specific internal energy, are properties of matter, and they can be measured and their values tabulated as functions of temperature and pressure for a particular substance for future use in the calculation of Q or W for any process involving that substance. The measurement, correlation, and use of these state functions is treated in detail in later chapters. 

A property that occurs in the energy balance equation for open systems (Section 7.4c is the specific enthalpy, defined as... 

We next examine the other functions of state that had been introduced in the preceding section. The first of these is the enthalpy, defined by... 

In order to transform the enthalpy balance into a jump entropy balance, we introduce the Gibbs free enthalpies defined by ([42], p. 402) ... 

The L terms are partial molal enthalpies defined by Equation 9. Another method which calculates the enthalpy change for adding 1 mole of monomer to the micelle has also been used. Additional explanation of these methods can be found in the literature (1,5). 

Hji virtual value of the partial molar enthalpy defined by Eq. (8-28)... 

In turbulent compressible flows the total (stagnation) enthalpy, defined as feg = + uj / 2, is offen used as depen-denf variable. Then fhe energy conservafion equafion is generally rewritten as ... 

Halliwell and Nyburg ° argued that the division into individual ionic contributions of Ai/g iv could be achieved semi-empirically using Buckingham s concepts. They employed enthalpies of solvation relative to the hydrogen ion (conventional enthalpies) defined by... 

Another state property, closely related to internal energy, is enthalpy, defined by the... 

Enthalpy Defining Enthalpy AH of Phase Changes Vaporization and Electricity... 

The hydration enthalpies, defined by equation (4), play an important role in determining the solution properties of the ions and the compounds that contain them. 

To be more precise, the stress-induced transformation is based on a reduction of the free enthalpy, defined in equation (C.4). The phase with the larger volume is thermodynamically stable, but, as already stated, a nucleation barrier has to be overcome to transform the particle. If hydrostatic tensile stress is added, the free enthalpy of the phase with... 

Recall that AHm(rxn) is a molar integral reaction enthalpy equal to A//(rxn)/A, and that ArH is a molar differential reaction enthalpy defined by and equal to (dH/d )T,p-... 

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