Look up: enthalpy

1. Enthalpy
   The heat content of a specific amount of substance; defined as E= PV.
   Found on http://home.nas.net/~dbc/cic_hamilton/di
   
   
2. Enthalpy
   A measure of internal energy of a system. For a gas: H=E+pV Where H is the enthalpy, E is the internal energy, p is the pressure and V is the volume.
   Found on http://www.geologyrocks.co.uk/glossary/l
   
   
3. enthalpy
   enthalpy or Helmholtz free energy (identifier H): for thermodynamic systems, it makes a difference if a process that changes U is carried out at constant volume or at constant pressure. For a process at constant volume and entropy, use internal energy U. For a process at constant pressure and entropy, enthalpy is a better choice
   Found on http://www.encyclo.co.uk/visitor-contrib
   
   
4. Enthalpy
   Change in heat. See also: Heat, Hess's Law, Stagnation Enthalpy.
   Found on http://www.diracdelta.co.uk/science/sour
   
   
5. Enthalpy
   The heat content of a specific amount of substance, defined as E= PV.
   Found on http://www.allchemicals.info/index/actio
   
   
6. enthalpy
   (H) enthalpy change. 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....
   Found on http://antoine.frostburg.edu/chem/senese
   
   
7. enthalpy
   Enthalpy (H) is a thermodynamic property of a system defined by H = U + pV where U is the internal energy of the system, p its pressure, and V its volume. J.W. Gibbs put the concept of an ensemble forward in 1902. In a chemical reaction carried out in the atmosphere the pressure remains constant and...
   Found on http://www.ktf-split.hr/periodni/en/abc/
   
   
8. Enthalpy
   is the heat of reaction, either exo- or endothermic. It is measured either in kilocalories/mole or kilojoules/mole.
   Found on http://www.chemicalglossary.net/definiti
   
   
9. Enthalpy
   Change in heat.
   Found on http://www.chemicalglossary.net/definiti
   
   
10. enthalpy
    Change in heat.
    Found on http://www.shodor.org/UNChem/glossary.ht
    
    
11. Enthalpy
    The amount of energy released or absorbed by a chemical reaction. The 'Free Enthalpy' (also called the ' Change in Gibbs Free Energy') in a reaction is the maximum amount of chemical energy available from a system that can be converted into electrical or mechanical energy and vice versa. (discharge and charge respectively)
    Found on http://www.mpoweruk.com/glossary.htm
    
    
12. Enthalpy
    The sum of the internal energy of a body and the product of its volume multiplied by the pressure.
    Found on http://www.flowmeterdirectory.com/flowme
    
    
13. enthalpy
    heat content of moist air Category: Standards, measures and testing • function of state equal to the sum of the internal energy of a body and the product of pressure and its volume.H=U+pV Category: Chemistry
    Found on http://www.mijnwoordenboek.nl/definition
    
    
14. Enthalpy
    The quantity of heat necessary to raise the temperature of a substance from one point to a higher temperature. The quantity of heat includes both latent and sensible.
    Found on http://www.neo.ne.gov/statshtml/glossary
    
    
15. enthalpy
    The heat in a system. ... (09 Oct 1997) ...
    Found on http://www.mondofacto.com/facts/dictiona
    
    
16. enthalpy
    the sum of the internal energy and the product of the pressure and volume of a thermodynamic system. Enthalpy is an energy-like property or state ... [6 related articles]
    Found on http://www.britannica.com/eb/a-z/e/34
    
    
17. Enthalpy
    The sum H of the internal energy U and the work energy PV of a fluid at a given temperature and pressure.. H = U + PV. (J/g)
    Found on http://www-bdnew.fnal.gov/operations/acc
    
    
18. Enthalpy
    Enthalpy is a measure of the total energy of 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 is a thermody...
    Found on http://en.wikipedia.org/wiki/Enthalpy
    
    
19. Enthalpy
    The sum H of the internal energy U and the work energy PV of a fluid at a given temperature and pressure.. H = U + PV. (J/g)
    Found on http://www-bdnew.fnal.gov/operations/acc
    
    
20. enthalpy
    function of the state of a physical system equal to the sum of the internal energy of the system and the product of pressure and volume of the system
    Found on http://www.electropedia.org/iev/iev.nsf/
    
    
21. enthalpy
    A thermodynamic property of a substance given by, H = U + pV, where U is the internal energy, p is the pressure, and V is the volume. For any process that occurs at constant pressure the heat absorbed or evolved is equalt to the enthalpy change if the only work is pressure/volume work, i.e. &Delta...
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22. enthalpy
    A thermodynamic property of a substance, defined as the sum of its internal energy plus the pressure of the substance times its volume, divided by the mechanical equivalent of heat. The total heat content of air; the sum of the enthalpies of dry air and water vapor, per unit weight of dry air; measu...
    Found on http://www.daviddarling.info/encyclopedi
    
    
23. enthalpy
    enthalpy (en'thălpē) , measure of the heat content of a chemical or physical system; it is a quantity derived from the heat and work relations studied in thermodynamics. As a system changes from one state to another the enthalpy change, ΔH, is equal to the enthalpy of the produ...
    Found on http://www.infoplease.com/ce6/sci/A08174
    
    
24. enthalpy
    (H) Type: Term Pronunciation: en′thal-pē Definitions: 1. Heat content, symbolized as H; a thermodynamic function, defined as E + PV, where E is the internal energy of a system, P the pressure, and V the volume; the heat of a reaction, measured at constant pressure, is ΔH. Synonyms: heat4
    Found on http://www.medilexicon.com/medicaldictio
    
    
25. enthalpy
    Alternative term for energy of reaction, the heat energy associated with a chemical change at constant pressure. Along with entropy, enthalpy is one of the key parameters of thermodynamics. It is abbreviated as H and can be expressed as H=U+pV where U is the internal energy of a system, p is the pressure, and V the volume. As most chemical ...
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