Navigation Links
Free energy



In thermodynamics, free energy is a measure of the amount of work that can be extracted from a system. In this sense, it measures not the energy content of the system, but the "useful energy" content.

In different situations, free energy is related to internal energy in different ways. For instance, in chemistry one is usually concerned with fluid systems at constant temperature, undergoing chemical reaction in closed containers (at constant volume) or in open containers (at constant pressure). In the first case one would use the Helmholtz free energy as a measure of available work, and in the second one would use the Gibbs free energy. Physicists carry out more abstract analysis of systems which are not necessarily fluid. In that context, the Helmholtz free energy is more common, and it is also directly related to the partition function of a canonical ensemble in statistical mechanics. In the isothermal-isobaric ensemble, the partition function is related to the Gibbs free energy. For this reason, there is some confusion in terminology, which we disentangle below.

The usage in physics and chemistry is as follows:


'"/>


(Date:4/18/2020)... ... April 17, 2020 , ... ... lab device that uses magnetic nano-beads to isolate minute bacterial particles that ... of bacterial infections and difficult-to-detect micro-particles such as those making up Ebola ...
(Date:4/16/2020)... ... April 15, 2020 , ... ... cell banks and hMSC bioprocess systems, announces that the Medical Technology Enterprise Consortium ... MTEC’s 4th Annual Membership Meeting in March. The Regenerative Medicine (RegenMed) biomanufacturing collaboration ...
(Date:4/14/2020)... NY (PRWEB) , ... April 14, 2020 , ... ... foam bedding and innovative home comfort technologies, announced today its planned donation of ... organizations in need of masks protect against the COVID-19 pandemic. , “At the ...
Breaking Biology News(10 mins):
Other biology definition