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...h;pressure ''p''. The reaction heat ''Q'' is then equal to the change in [[enthalpy]] &Delta;''H'' of the reactants. Indeed, according to the first law of ther ...sub> < 0. Correspondingly, an endothermic reaction has a positive reaction enthalpy.

...extrapolated liquid vapor pressures (of the supercooled liquid), if the [[Enthalpy of fusion|heat of fusion]] is known, by using this particular form of the [

...nomial, which yields a complicated expression. Therefore, expressing the [[enthalpy]] and the [[Gibbs energy]] as functions of their natural variables will be

...bar (6.2 to 2.1 MPa) , which is an [[enthalpic]] process (i.e., a constant enthalpy process) that results in lowering the temperature of the stream from about

...rmodynamics)|characteristic function]]s, but expressing, for instance, the enthalpy ''H'' &equiv; ''A'' + ''TS'' + ''pV'' as function of its natural variables

*[[Enthalpy]] (''H'').

...c flash evaporation process is [[isenthalpic]] (i.e., occurs at constant [[enthalpy]]).

...hat is either produced or needed by the reaction is found from the total [[Enthalpy]] change. Other concerns include whether [[side reaction]]s occur from the

where the [[enthalpy of reaction]] &Delta;''H'' is &minus;571.6 kJ<ref>E. A. Guggenheim, ''Therm

...[http://lenr-canr.org/acrobat/MilesMcorrelatioa.pdf Correlation of excess enthalpy and helium-4 production]: A Review, in Tenth International Conference on Co