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:
“It is a fundamental characteristic of civilization that man most profoundly mistrusts those living outside his own milieu, so that not only does the Teuton regard the Jew as an incomprehensible and inferior being, but the football player likewise so regards the piano player.”
—Robert Musil (18801942)
“To be a good enough parent one must be able to feel secure in ones parenthood, and ones relation to ones child...The security of the parent about being a parent will eventually become the source of the childs feeling secure about himself.”
—Bruno Bettelheim (20th century)