In thermodynamics, the fundamental thermodynamic relation is generally expressed as an infinitesimal change in internal energy in terms of infinitesimal changes in entropy, and volume for a closed system in thermal equilibrium in the following way.
Here, U is internal energy, T is absolute temperature, S is entropy, P is pressure, and V is volume.
This is only one expression of the fundamental thermodynamic relation. It may be expressed in other ways, using different variables (e.g. using thermodynamic potentials). For example, the fundamental relation may be expressed in terms of the Helmholtz free energy (F) as:
Read more about Fundamental Thermodynamic Relation: Derivation From The First and Second Laws of Thermodynamics, Derivation From Statistical Mechanical Principles
Famous quotes containing the words fundamental and/or relation:
“Disney World has acquired by now something of the air of a national shrine. American parents who don’t take their children there sense obscurely that they have failed in some fundamental way, like Muslims who never made it to Mecca.”
—Simon Hoggart (b. 1946)
“The problem of the twentieth century is the problem of the color-line—the relation of the darker to the lighter races of men in Asia and Africa, in America and the islands of the sea. It was a phase of this problem that caused the Civil War.”
—W.E.B. (William Edward Burghardt)