enthalpy – מילון אנגלי-אנגלי
enthalpy
n.
sum of the internal heat in a system plus the product of the system's volume and external pressure (Thermodynamics)
Enthalpy
Enthalpy is a measure of
energy in a
thermodynamic system. It includes the
internal energy, which is the energy required to create a system, and the amount of energy required to make room for it by displacing its
environment and establishing its volume and pressure.
enthalpy
Noun
1. (thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure; "enthalpy is the amount of energy in a system capable of doing mechanical work"
(synonym) heat content, total heat, H
(hypernym) physical property
(classification) thermodynamics
enthalpy
(H) Compare with
heat .Enthalpy (H) is defined so that changes in enthalpy (
H) are equal to the heat absorbed or released by a process running at constant pressure. While changes in enthalpy can be measured using calorimetry, absolute values of enthalpy usually cannot be determined. Enthalpy is formally defined as H = U + PV, where U is the internal energy, P is the pressure, and V is the volume.
enthalpy
