For example, hydrogen and oxygen are stable in their elemental form, so their enthalpy of formation is zero. However, an amount of energy (241.5 kJ) is released per mole when they combine to form steam. (3.13)H2gas+0.5O2gas=H2Ogas−241.5 kJ/mol The HF of steam, HFH2O is thus ...
Method for production of heat and hydrogen gasMicro electrochemical cells which utilize an intimate mixture of active and assive metals are reacted with seawater for producing heat and hydrogen gas for use as a heat source, energy source, or buoyancy generator for use in remote areas....
Hydrogen bonds in adsorption One of the common reasons for molecular association in aqueous solutions and other liquids is the formation of hydrogen bonds between the pertinent polar parts of the molecules, e.g. between the hydroxyl groups. This association also occurs during adsorption on adsorbents...
The curve of integral heat of adsorption has an inflection at the transition point, and the differential heat of adsorption changes jumpwise. The values of these effects were estimated by the simplest model of formation of one and two hydrogen bonds between a water molecule and an adsorption ...
AbstractOne of the effective options for energy saving in terms of heat costs for the formation of routine thermal conditions of working areas of large-sized industrial premises is the replacement of traditional convective (water) heating systems with systems, the main part of which are gas infrare...
AbstractOne of the effective options for energy saving in terms of heat costs for the formation of routine thermal conditions of working areas of large-sized industrial premises is the replacement of traditional convective (water) heating systems with systems, the main part of which are gas infrare...
It is more likely related to the formation of an insulating gas layer, resulting from the expansion of internal volume of gas before reaching the boiling point. In the boiling stage in which vapor bubbles appear, buoyancy force and rising natural convection currents are in the same direction ...
ofatomic weightsthat Dalton compiled, as well as many new gases discovered by other scientists, were important in supporting not only Lavoisier’s theory of combustion but his whole new system ofchemistrybased on accurate measurement. The discoveries ofnitrogenandhydrogenin the latter half of the ...
Int. J. Hydrogen Energy 2022, 47, 9428–9459. [Google Scholar] [CrossRef] Ji, H.; Luo, T.; Dai, L.; He, Z.; Wang, Q. Numerical investigation on the polarization and thermal characteristics of LiFePO4-based batteries during charging process. Appl. Therm. Eng. 2022, 214, 118709. [...
Bentz (2007) qualitatively compares the heat capacity of this porewater phase with that of water ice, noting the unusually high specific heat capacity of bulk liquid water can be attributed to energy consumed in bending and breaking of mobile hydrogen bonds. In molecular-dynamics simulations, Qomi...