Αποτελέσματα Αναζήτησης
Solid hydrogen is the solid state of the element hydrogen, achieved by decreasing the temperature below hydrogen's melting point of 14.01 K (−259.14 °C; −434.45 °F).
i;' 'h'j r-':bns a:0<isy®feS •A’lv,»Vi-.c:.h't. \ .v„ '. 1*9 •r • /Hi'-v'(ft:,-naI'I,'.:.t,. lit'{ "'^'‘"--u^ •"'* sf •..r.!<.jri ^c!j'lf(tuiiii'«v ...
In this paper thermal data on hydrogen in its various isotopic and ortho-para modifications are compiled and correlated. Data on properties of the gaseous, liquid, and solid states are presented in tables and graphs, and by use of formulas. Thermodynamic properties are given for the ideal gas state. In addition, tables based on the PVT
Hydrogen requires a theoretical minimum of 3.3 kWh/kg (12 MJ/kg) to liquefy, and 3.9 kWh/kg (14 MJ/kg) including converting the hydrogen to the para isomer, but practically generally takes 10–13 kWh/kg (36–47 MJ/kg) compared to a 33 kWh/kg (119 MJ/kg) heating value of hydrogen.
26 Νοε 2020 · Figure 5.1 shows the temperature dependence of hydrogen and oxygen solubility in water. At room temperature (20 °C), the solubility of hydrogen is 1.6 ppm. When this limit is reached, the water is called saturated hydrogen water. At room temperature, hydrogen solubility is approximately 1/30th that of oxygen.
15 Σεπ 2020 · Five dominant HB configurations are identified in water: two types of tetrahedral, single donor (SD) HB configuration, single hydrogen-bonded water (SHW), and free water (FW) without any hydrogen bonds, which are represented by five sub-bands.
The table of specific heat capacities gives the volumetric heat capacity as well as the specific heat capacity of some substances and engineering materials, and (when applicable) the molar heat capacity.
