zero enthalpy

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• enthalpy — /en thal pee, en thal /, n., pl. enthalpies. Thermodynamics. a quantity associated with a thermodynamic system, expressed as the internal energy of a system plus the product of the pressure and volume of the system, having the property that… …   Universalium

• Enthalpy — Thermodynamics …   Wikipedia

• Standard enthalpy change of formation — The standard enthalpy of formation or standard heat of formation of a compound is the change of enthalpy that accompanies the formation of 1 mole of a substance in its standard state from its constituent elements in their standard states (the… …   Wikipedia

• Absolute zero — For other uses, see Absolute Zero (disambiguation). Absolute zero is the theoretical temperature at which entropy reaches its minimum value. The laws of thermodynamics state that absolute zero cannot be reached using only thermodynamic means. A… …   Wikipedia

• Stagnation enthalpy — or total enthalpy ( h t ) is the enthalpy of a flow at a stagnation point. It is the enthalpy a flow would possess if brought to rest (zero speed) isentropically from speed v. h t = C p T + frac{v^2}{2}where, C p = specific heat capacity at… …   Wikipedia

• Thermodynamic temperature — is the absolute measure of temperature and is one of the principal parameters of thermodynamics. Thermodynamic temperature is an “absolute” scale because it is the measure of the fundamental property underlying temperature: its null or zero point …   Wikipedia

• Thermodynamic databases for pure substances — Thermodynamic databases contain information about thermodynamic properties for substances, the most important being enthalpy, entropy, and Gibbs free energy. Numerical values of these thermodynamic properties are collected as tables or are… …   Wikipedia

• liquid — liquidly, adv. liquidness, n. /lik wid/, adj. 1. composed of molecules that move freely among themselves but do not tend to separate like those of gases; neither gaseous nor solid. 2. of, pertaining to, or consisting of liquids: a liquid diet. 3 …   Universalium

• Specific heat capacity — Specific heat capacity, also known simply as specific heat, is the measure of the heat energy required to increase the temperature of a unit quantity of a substance by a certain temperature interval. The term originated primarily through the work …   Wikipedia

• Joule–Thomson effect — In physics, the Joule–Thomson effect or Joule–Kelvin effect describes the temperature change of a gas or liquid when it is forced through a valve or porous plug while kept insulated so that no heat is exchanged with the environment.cite book… …   Wikipedia

• thermodynamics — thermodynamicist, n. /therr moh duy nam iks/, n. (used with a sing. v.) the science concerned with the relations between heat and mechanical energy or work, and the conversion of one into the other: modern thermodynamics deals with the properties …   Universalium