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The higher heating value takes into account the latent heat of vaporization of water in the combustion products, and is useful in calculating heating values for fuels where condensation of the reaction products is practical (e.g., in a gas-fired boiler used for space heat). In other words, HHV assumes all the water component is in liquid state ...
The isobaric change in enthalpy H above the common reference temperature of 298.15 K (25 °C) is called the high temperature heat content, the sensible heat, or the relative high-temperature enthalpy, and called henceforth the heat content.
A Assuming an altitude of 194 metres above mean sea level (the worldwide median altitude of human habitation), an indoor temperature of 23 °C, a dewpoint of 9 °C (40.85% relative humidity), and 760 mmHg sea level–corrected barometric pressure (molar water vapor content = 1.16%).
One exception is phosphorus, for which the most stable form at 1 bar is black phosphorus, but white phosphorus is chosen as the standard reference state for zero enthalpy of formation. [2] For example, the standard enthalpy of formation of carbon dioxide is the enthalpy of the following reaction under the above conditions:
The standard Gibbs free energy of formation (G f °) of a compound is the change of Gibbs free energy that accompanies the formation of 1 mole of a substance in its standard state from its constituent elements in their standard states (the most stable form of the element at 1 bar of pressure and the specified temperature, usually 298.15 K or 25 °C).
Std enthalpy change of formation, Δ f H o solid: −1093.99 kJ/mol Standard molar entropy, S o solid: 88.7 J/(mol K) Heat capacity, c p? J/(mol K) Liquid properties Std enthalpy change of formation, Δ f H o liquid? kJ/mol Standard molar entropy, S o liquid? J/(mol K) Heat capacity, c p? J/(mol K) Gas properties Std enthalpy change of ...
Higher Heating Value (HHV) is commonly used by the local air quality management authority in Southern California, perhaps by other air quality regulatory agencies as well. If this is combined with Heat of Combustion, "Higher Heating Value" should be such that it is searchable from a search engine such as Google, since many people, such as I ...
Heat content may refer to: Enthalpy, measure of energy in a thermodynamic system; Heat of combustion, amount of heat released by combustion of a quantity of substance; Ocean heat content, thermal energy stored in ocean water; Heat content (fuel), industrial term for heat energy available from a unit of fuel