Theory, meaning

The rapid IVR assumption of RRKM theory means that a microcanonical ensemble is maintained as the A molecnles decompose so that, at any time t, k(E) is given by... 

Quantum Mechanics offers the most comprehensive and most successful explanation of many chemical phenomena such as the nature of valency and bonding as well as chemical reactivity. It has also provided a fundamental explanation of the periodic system of the elements which summarizes a vast amount of empirical chemical knowledge. Quantum Mechanics has become increasingly important in the education of chemistry students. The general principles provided by the theory mean that students can now spend less time memorizing chemical facts and more time in actually thinking about chemistry. 

These values are, in some sense derived from corrosion theory, "mean" or "mixed" potentials because they are determined by exchange of two charged species. When activity coefficients are ignored equation 13 reduces to 10. By the same analysis, a single salt MY partitioned gives a constant potential in equation 9. 

To most chemists, theory means the theory of the chemical bond, or valence theory. A satisfactory theory should ... 

A theory also serves as a scientific model. A model can be a physical model made of wood or plastic, a computer program that simulates events in nature, a mathematical model or simply a mental picture of an idea. A model illustrates a theory and explains nature. In your chemistry course, you will develop a mental (and maybe a physical) model of the atom and its behavior. Outside of science, the word theory is often used to describe someone s unproven notion about something. In science, theory means much more. It is a thoroughly tested explanation of things and events observed in nature. 

In order to show that the model of independent, coexistent continua represents correctly a real mixture of gases composed of different chemical species, we must compare the results obtained from this model with those of the kinetic theory of nonuniform gas mixtures (see Appendix D). Quantities such as the density p, the mass-weighted average velocity v j, and the body force fj have obviously analogous meanings in both the kinetic theory and the coexistent-continua model. On the other hand, the precise kinetic-theory meaning of terms such as the stress tensor, the absolute internal energy per unit mass and the heat-flux vector qf is not immediately apparent. In view of the known success of continuum theory for one-com-... 

MPn n -order Mpller-Plesset theory. Means of including electron correlation. 

Outside of science, the word theory is often used to describe someone s unproven notion about something. In science, theory means much more. It is a thoroughly tested explanation of things and events observed in nature. 

There have been many studies of the effect of added electrolytes on ET rates [171, 234, 235], The main effect of ionic atmosphere is electrostatic screening, which is usually accounted for in terms of Debye-Huckel theory (mean-field, low-concentration approximation). At sufficiently low ionic strength, the corresponding component of the activation energy is simply proportional to the ratio of the Onsager radius (also referred to as the... 

Different classification schemes often use different words which should, in theory, mean the same but there will always be some difference in the way in which the terms can be interpreted. It might even be wondered that if the words themselves leave much latitude in the manner of their interpretation, how the resource base can be determined with any precision. The terminology used here is that more commonly found although other systems do exist and should be treated with caution in the interpretation. 

During the last decade, the statistical thermodynamics of electrolytes have been continuously developed. The MSA theory (Mean Spherical Approximation) can yield analytical expressions for parameters which have a certain physical meaning (e.g., ionic diameter). To maintain the advantages of the NRTL electrolyte model and overcome its difficulties, the MSA theory has been successfully combined with the NRTL equation by Kunz and his co-workers (25). 

Computer simulations are likely to be useful in two distinct cases the first in which numerical data of a specified accuracy are required, possibly for some utilitarian purpose the second, perhaps more fundamentally, in providing guidance to the theoretician s intuition, for example, by comparing numerical results with those from approximate analytical theories (such as perturbation theory, mean-field approximation, integral equation methods). Naturally, the models used should reflect those generic properties of polymers that are the result of the chain-like stmcture of macromolecules. 

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