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Standard Enthalpy

Posted: Sun Jan 26, 2020 7:29 pm
by Erik Buetow 1F
What is the difference between standard reaction enthalpy and standard enthalpy of formation?

Re: Standard Enthalpy

Posted: Sun Jan 26, 2020 7:44 pm
by Chris Tai 1B
Standard reaction enthalpy (deltaH) is the enthalpy of the reaction that occurs when all the reactants and products are in their standard state at 1 atmosphere.
Standard enthalpy of formation (deltaHf) is the standard reaction enthalpy (deltaH) for the formation of one mole of a substance from its elements in their most stable form.

Re: Standard Enthalpy

Posted: Mon Jan 27, 2020 8:58 am
by Justin Quan 4I
To add on, the reaction enthalpy is the heat given off or taken up for the reaction; hence, the enthalpy difference between the reactants and products. The enthalpy of formation is formation of a compound from its elements in their most stable states: temperature and pressure.

Re: Standard Enthalpy

Posted: Tue Jan 28, 2020 10:46 am
by Jamie Lee 1F
Standard reaction enthalpy is the heat given off or absorbed during reaction, while standard enthalpy of formation is the enthalpy change between the elements in their standard state (reactants) and the compound (product).