Examples of using Enthalpy in English and their translations into Vietnamese
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The enthalpy of combustion for hydrogen is- 286 kJ/mol.
The octahedral molecule RnF6was predicted to have an even lower enthalpy of formation than the difluoride.
The enthalpy of combustion for hydrogen is -286 kJ/mol, and is described by the equation.
This is the only method thatis able to identify free energy and enthalpy in the same experiment;
The relationship between activation energy(Ea) and enthalpy of formation(ΔH) with and without a catalyst, plotted against the reaction coordinate.
And thereby allowing us toseparate free energy into two separate contributions from enthalpy and from entropy.
In thermodynamics it is also used to obtain the enthalpy and the Helmholtz and Gibbs energies from the internal energy.
The heat exchange between a chemical reaction andits environment is known as the enthalpy of reaction, or H.
(The heat change at constant pressure is called the enthalpy change; in this case the enthalpy of reaction, if initial and final temperatures are equal).
A pressure gradient has thepotential to perform work on the surroundings by converting enthalpy to work until equilibrium is reached.
Holtop owns numeral control machines, national approved enthalpy labs, and has successfully passed the certifications of ISO9001, ISO14001, OHSAS18001, CE and EUROVENT.
In other words, while heat may not be removed from a system at absolute zero,it does not represent the lowest possible enthalpy state.
The wool thread functions as an artifi cial template,reducing the enthalpy and encouraging the dissolved salt to form a crystal.
Panasonic's new heat recovery solution performs well in extreme weather conditions andcan achieve up to 77% efficiency(63% in enthalpy efficiency).
This is the change of enthalpy when one mole of a substance in its standard state is formed from its elements under standard state conditions of 1 atmosphere pressure and 298K temperature.
It can be produced by electricaldischarge in ketene at low pressure(less than one torr) and its enthalpy of reaction is determined to be about 252.2±3.3 kJ/mol.
Measured values are also converted to other humidity interpretation: dew point temperature, absolute humidity, specific humidity, mixing ratio,specific enthalpy.
The enthalpy of combustion of propane gas where products do not return to standard state, for example where the hot gases including water vapor exit a chimney, is- 2043.455 kJ/mol.
For instance, let's say that we have an unknown liquid with a vapor pressure of 25 torr at 273 K and 150 torr at 325 K andwe want to find this liquid's enthalpy of vaporization(ΔHvap).
Adopting world-class Enthalpy potential laboratory to test heat pumps, except basic testing items, we also test heat pump in the ambient of temperature of -30℃ to test our heat pump performance.
Thermal cracking is an example of a reaction whose energetics are dominated by entropy(∆S°)rather than by enthalpy(∆H°) in the Gibbs Free Energy equation∆G°=∆H°-T∆S°.
Economisers are so named because they can make use of the enthalpy in fluid streams that are hot, but not hot enough to be used in a boiler, thereby recovering more useful enthalpy and improving the boiler's efficiency.
In the early 1980's workers at NIST(formerly NBS), in the USA, decided to produce an improved bench scale heat release test which would overcome the deficiencies of existing small scale heatrelease tests which relied on the measurement of the outflow enthalpy of enclosed systems.
Note that if your equation has multiple products, you will need to perform the enthalpy calculation for the component reaction used to produce each product, then add them together to find the enthalpy for the entire reaction.
Liquid ammonia has a very high standard enthalpy change of vaporization(23.35 kJ/mol, cf. water 40.65 kJ/mol, methane 8.19 kJ/mol, phosphine 14.6 kJ/mol) and can therefore be used in laboratories in non-insulated vessels at room temperature.
Product Features 1 The vacuuming device is used to make the producedfilm better fit to the casting cooling enthalpy the cooling effect is better and the film performance is improved 2 The casting cooling part adopts a large diameter double layer circulating cooling system to make the surface temperature of the….