Standard Rxn Enthalpies for liquids and solids

Moderators: Chem_Mod, Chem_Admin

Daisylookinland
Posts: 46
Joined: Fri Sep 28, 2018 12:28 am

Standard Rxn Enthalpies for liquids and solids

Postby Daisylookinland » Mon Jan 28, 2019 1:08 pm

In the notes, Dr. Lavelle wrote "for a pure liquid or solid it [the standard rxn enthalpy] is the pure L or S"
Can someone explain what this means?

Laura Gong 3H
Posts: 89
Joined: Fri Sep 28, 2018 12:26 am
Been upvoted: 1 time

Re: Standard Rxn Enthalpies for liquids and solids

Postby Laura Gong 3H » Mon Jan 28, 2019 2:23 pm

It just means that the most stable form (its standard state) of a pure liquid or solid is liquid or solid.

Kayla Vo 1B
Posts: 60
Joined: Fri Sep 28, 2018 12:26 am

Re: Standard Rxn Enthalpies for liquids and solids

Postby Kayla Vo 1B » Mon Jan 28, 2019 7:27 pm

To add on, the standard state basically is the physical state (solid, liquid, or gas) that a substance would be in under standard conditions (1.00 atm and 25 degrees Celsius). So, the standard state for carbon is solid and for water is liquid.


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