free energy


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energy

 [en´er-je]
power that may be translated into motion, overcoming resistance or causing a physical change; the ability to do work. Energy assumes several forms; it may be thermal (in the form of heat), electrical, mechanical, chemical, radiant, or kinetic. In doing work, the energy is changed from one form to one or more other form(s). In these changes some of the energy is “lost” in the sense that it cannot be recaptured and used again. Usually there is loss in the form of heat, which escapes or is dissipated unused; all energy changes give off a certain amount of heat.ƒ

All activities of the body require energy, and all needs are met by the consumption of food containing energy in chemical form. The human diet comprises three main sources of energy: carbohydrates, proteins, and fats. Of these three, carbohydrates most readily provide the kind of energy needed to activate muscles. Proteins work to build and restore body tissues. The body transforms chemical energy derived from food by the process of metabolism, an activity that takes place in the individual cell. Molecules of the food substances providing energy pass through the cell wall. Inside the cell, chemical reactions occur that produce the new forms of energy and yield by-products such as water and waste materials; see also adenosine triphosphate.
free energy (Gibbs free energy (G)) the energy equal to the maximum amount of work that can be obtained from a process occurring under conditions of fixed temperature and pressure.
nuclear energy energy that can be liberated by changes in the nucleus of an atom (as by fission of a heavy nucleus or by fusion of light nuclei into heavier ones with accompanying loss of mass).

free en·er·gy (F),

a thermodynamic function symbolized as F, or G (Gibbs free energy), = H - TS, where H is the enthalpy of a system, T the absolute temperature, and S the entropy; chemical reactions proceed spontaneously in the direction that involves a net decrease in the free energy of the system (that is, ΔG < 0).

free en·er·gy

(F) (frē en'ĕr-jē)
A thermodynamic function symbolized as F, or G (Gibbs free energy), =H-TS, where H is the enthalpy of a system, T the absolute temperature, and S the entropy; chemical reactions proceed spontaneously in the direction that involves a net decrease in the free energy of the system (i.e., ΔG < 0).

free energy

the amount of energy that is available for work when released in a chemical reaction. For example, when a molecule of ATP is hydrolysed to ADP + P, the free energy released is about 34 kJ.
References in periodicals archive ?
In comparison of 1,3-dibromide 2 and 1,4-dibromide 3, it was observed that Gibbs free energy of 1,3-dibromide 2 was low, so reaction was favorable to form 1,3-dibromide 2 (Fig.
Preparation of higher order system free energy derived from the fourth to the eighth, and the related determinants det [A.sub.i], where i is the order of the derivative was performed using the same algorithm.
A wetting process of the surface with solutions of acids and bases as test liquids may only be used for the neutral and hydrophobic surfaces using liquids with a relatively high surface free energy of the solvent.
Therefore, the surface free energy of the liquid-solid interface can be expressed as follows:
The issue with the Dupre equation is that it contains components that are difficult if not impossible to measure, specifically, the interfacial free energy. Young (2,3) developed an equation to describe the relationship between interfacial energy and contact angle:
"If there are any customers similarly affected after today, July 21, we will review on a case-by-case approach in line with the ombudsman's current policy and also provide free energy where the remedy has not been completed due to our process or system."
Generally two methods are employed; free energy minimization and comparative analysis for the prediction of RNA secondary and tertiary structure from its primary structure.
Today thousands of scientists, researchers and inventors are following Tesla's example and striving to bring free energy to our world.
Any council tenant can request a free Energy for the Future advice visit ahead of the winter months.
They also provided a free energy monitoring service which has helped residents to identify any potential opportunities to reduce their energy consumption and so reduce their energy bills.
Sustainable energy sepcialist Tadea is working with Erimus Housing in Middlesbrough to carry out free energy checks on properties.