Enthalpy (/ˈɛnθəlpi/ ) is the sum of a thermodynamic system's internal energy and the product of its pressure and volume. It is a state function in thermodynamics...
48 KB (6,203 words) - 21:25, 4 July 2024
the enthalpy of vaporization (symbol ∆Hvap), also known as the (latent) heat of vaporization or heat of evaporation, is the amount of energy (enthalpy) that...
21 KB (1,015 words) - 20:23, 18 December 2023
thermodynamics, the standard enthalpy of formation or standard heat of formation of a compound is the change of enthalpy during the formation of 1 mole...
29 KB (1,880 words) - 09:26, 17 August 2024
In thermodynamics, the enthalpy of fusion of a substance, also known as (latent) heat of fusion, is the change in its enthalpy resulting from providing...
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In chemistry, the enthalpy of atomization (also atomisation in British English) is the enthalpy change that accompanies the total separation of all atoms...
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The standard enthalpy of reaction (denoted Δ H reaction ⊖ {\displaystyle \Delta H_{\text{reaction}}^{\ominus }} ) for a chemical reaction is the difference...
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In thermodynamics, the enthalpy of sublimation, or heat of sublimation, is the heat required to sublimate (change from solid to gas) one mole of a substance...
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In thermodynamics, the enthalpy of mixing (also heat of mixing and excess enthalpy) is the enthalpy liberated or absorbed from a substance upon mixing...
12 KB (1,892 words) - 02:39, 17 May 2024
stagnation enthalpy of a fluid is the static enthalpy of the fluid at a stagnation point. The stagnation enthalpy is also called total enthalpy. At a point...
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Heat of combustion (redirect from Standard enthalpy change of combustion)
fuel energy/mass of fuel energy/volume of the fuel There are two kinds of enthalpy of combustion, called high(er) and low(er) heat(ing) value, depending on...
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Hess's law (section Use of enthalpies of formation)
and physician who published it in 1840. The law states that the total enthalpy change during the complete course of a chemical reaction is independent...
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In thermochemistry, the enthalpy of solution (heat of solution or enthalpy of solvation) is the enthalpy change associated with the dissolution of a substance...
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Bond-dissociation energy (redirect from Bond dissociation enthalpy)
the standard enthalpy change when A−B is cleaved by homolysis to give fragments A and B, which are usually radical species. The enthalpy change is temperature-dependent...
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In chemistry and thermodynamics, the enthalpy of neutralization (ΔHn) is the change in enthalpy that occurs when one equivalent of an acid and a base undergo...
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performance. Since it is a constant-enthalpy process, it can be used to experimentally measure the lines of constant enthalpy (isenthalps) on the ( p , T )...
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An enthalpy–entropy chart, also known as the H–S chart or Mollier diagram, plots the total heat against entropy, describing the enthalpy of a thermodynamic...
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Hydration energy (redirect from Hydration enthalpy)
In chemistry, hydration energy (also hydration enthalpy) is the amount of energy released when one mole of ions undergoes hydration. Hydration energy is...
3 KB (345 words) - 16:35, 28 September 2023
an exothermic reaction is a "reaction for which the overall standard enthalpy change ΔH⚬ is negative." Exothermic reactions usually release heat. The...
5 KB (552 words) - 07:35, 19 March 2024
In thermodynamics, enthalpy–entropy compensation is a specific example of the compensation effect. The compensation effect refers to the behavior of a...
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Thermal wheel (redirect from Enthalpy wheel)
thermal wheel, also known as a rotary heat exchanger, or rotary air-to-air enthalpy wheel, energy recovery wheel, or heat recovery wheel, is a type of energy...
15 KB (2,089 words) - 00:50, 20 May 2024
Wind tunnel (redirect from High enthalpy wind tunnel)
transonic wind tunnel Supersonic wind tunnel Hypersonic wind tunnel High enthalpy wind tunnel Wind tunnels are also classified by the orientation of air...
50 KB (6,816 words) - 22:20, 8 August 2024
Latent heat (redirect from Enthalpy of transformation)
as the liquid's sensible heat onto the surface. The large value of the enthalpy of condensation of water vapor is the reason that steam is a far more effective...
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Lattice energy (redirect from Lattice enthalpy)
Born–Haber cycle Chemical bond Madelung constant Ionic conductivity Enthalpy of melting Enthalpy change of solution Heat of dilution Atkins; et al. (2010). Shriver...
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chemical reaction to the change in temperature, T, given the standard enthalpy change, ΔrH⊖, for the process. The subscript r {\displaystyle r} means...
22 KB (3,076 words) - 01:13, 10 August 2024
lattice energy (or more precisely enthalpy), which cannot otherwise be measured directly. The lattice enthalpy is the enthalpy change involved in the formation...
7 KB (941 words) - 22:25, 17 December 2023
lowest limit of the thermodynamic temperature scale; a state at which the enthalpy and entropy of a cooled ideal gas reach their minimum value, taken as zero...
40 KB (4,630 words) - 15:44, 31 July 2024
{m} }^{\circ }} is the standard enthalpy variation of a reaction (with subcases: formation enthalpy, combustion enthalpy...). E ∘ {\displaystyle E^{\circ...
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Thermodynamic databases for pure substances (redirect from Enthalpy of transition)
about thermodynamic properties for substances, the most important being enthalpy, entropy, and Gibbs free energy. Numerical values of these thermodynamic...
26 KB (3,579 words) - 20:01, 7 July 2024
change. The enthalpy of sublimation (also called heat of sublimation) can be calculated by adding the enthalpy of fusion and the enthalpy of vaporization...
23 KB (2,359 words) - 11:40, 24 July 2024
thermochemistry, it is a thermodynamic process with an increase in the enthalpy H (or internal energy U) of the system. In an endothermic process, the...
10 KB (960 words) - 14:51, 28 June 2024