Enthalpy

[Mya Majewski 1L]

What is the difference between the Enthalpy of Reaction and the Enthalpy of Formation?

[Seohyun Park 1L]

Enthalpy of reaction is how much heat (at constant pressure) the reaction absorbs or gives off (so a more general concept/term). Enthalpy of reaction is how much heat a reaction absorbs/gives off when a compound is formed from its constituent standard elements. An example of this would be the change in enthalpy when CO2 gas forms from Carbon and O2.

[Mya Majewski 1L]

Wait you said enthalpy of reaction for both, which one is which again?

[Dina Geotas 4A]

Enthalpy of reaction is first, and enthalpy of formation is second; Enthalpy of reaction is how much heat the reaction absorbs or gives off. Enthalpy of formation is how much heat a reaction absorbs or gives off when a compound is formed.

[Philipp_V_Dis1K]

The enthalpy of reaction is made up of the separate enthalpies of formation for the molecules involved