# enthalpy

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Related to enthalpy: entropy, Gibbs free energy

## en·thal·py

(ĕn′thăl′pē, ĕn-thăl′-)
n. pl. en·thal·pies
Symbol H A thermodynamic function of a system, equivalent to the sum of the internal energy of the system plus the product of its volume multiplied by the pressure exerted on it by its surroundings.

[Greek enthalpein, to heat in (en-, in; see en-2 + thalpein, to heat) + -y.]

## enthalpy

(ˈɛnθəlpɪ; ɛnˈθæl-)
n
(General Physics) a thermodynamic property of a system equal to the sum of its internal energy and the product of its pressure and volume. Symbol: H Also called: heat content or total heat
[C20: from Greek enthalpein to warm in, from en-2 + thalpein to warm]

## en•thal•py

(ˈɛn θæl pi, ɛnˈθæl-)

n., pl. -pies.
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.
[1925–30; < Greek enthálp(ein) to warm in (en- en-2 + thálpein to warm)]

## en·thal·py

(ĕn′thăl′pē)
The amount of energy contained in a system.

## enthalpy

A measure of the stored heat energy contained in a substance.
ThesaurusAntonymsRelated WordsSynonymsLegend:
 Noun 1 enthalpy - (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"physical property - any property used to characterize matter and energy and their interactionsthermodynamics - the branch of physics concerned with the conversion of different forms of energy
References in periodicals archive ?
Additionally, Figure 2 shows that the differential enthalpy and entropy showed similar trends in relation to the moisture content, and the magnitudes also showed a tendency to stabilize at high moisture contents.
In this work we report measurement of dependence of Open Circuit Voltage (OCV) on temperature and the entropy and enthalpy change associated with the free energy of lithium intercalation in the structure of an experimental carbon.
The enthalpy of the fluid is a function of the temperature, and is utilized in the impeller/rotor work calculations.
Literature values for the gas phase enthalpy of formation of H atom are given in Table 1.
The freon condensation temperature [t.sub.fc], allowing to estimate the enthalpy [h.sub.3] and pressure [P.sub.c] of freon at the evaporator's exit,
It's crucial to understand enthalpy if you want to save energy in your cold climate aquaponics system.
"If the enthalpy sensors aren't calibrated properly, it doesn't take much on either side to turn your benefit upside down and increase the load of your air conditioning equipment rather than decreasing it," warns Callan.
Development experience, there is no mixing between the liquid phase and the gas phase and thus a mathematical development was carried using tables where the values of enthalpy, entropy of water, oxygen and hydrogen is shown as inputs to calculate enthalpy (AHR) and the reaction entropy (ASR) [15, 19, 22].
The hydrogen combustion enthalpy and chemical exergy vary rapidly with the increase of the reactant concentration by Method 1, while the hydrogen combustion enthalpy and chemical exergy vary a little and the reactant concentration has little effects on them by Method 1.
Some units may transfer both sensible and latent energy (enthalpy wheels) while others are sensible or latent only, and can be placed in series.
In particular the designer has selected 3 i-WHISPER ENTHALPY 0553 and 2 i-WHISPER ENTHALPY 0653 for a total of 1500 kW installed.
Guch, who has taught chemistry at the secondary and postsecondary levels, provides high school and college students with an explanation of chemistry that begins with basic concepts, such as the atom, data collection, and unit conversions, then moves on to topics like the periodic table, chemical compounds, and the mole; solids, liquids, and gases; chemical reactions, including stoichiometry, chemical equilibria, kinetics, and balancing equations; practical chemistry, including uses in nuclear weapons, buffers, and chelation therapy; and thermodynamics, with discussion of entropy, enthalpy, and free energy.

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