Enthalpy of formation

Moderators: Chem_Mod, Chem_Admin

Sydney Tay 2B
Posts: 64
Joined: Fri Sep 28, 2018 12:20 am

Enthalpy of formation

Postby Sydney Tay 2B » Sun Jan 27, 2019 4:30 pm

Can someone explain what the difference is between a standard enthalpy and the enthalpy of formation? And in which situations they should be used in.

Posts: 57
Joined: Fri Sep 28, 2018 12:23 am

Re: Enthalpy of formation

Postby hazelyang2E » Sun Jan 27, 2019 4:37 pm

Standard reaction enthalpy is ΔH when all of the reactants and products are in their standard states at 1 atm. Standard Enthalpy of Formation is ΔH for the formation of 1 mole of a substance from its elements in their most stable form. I believe standard reaction enthalpy relates more to the transformation that occurs during any chemical reaction, while the standard enthalpy of formation relates more specifically to the formation of a compound.

Return to “Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)”

Who is online

Users browsing this forum: No registered users and 1 guest