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Karina Koo 2H
Posts: 49
Joined: Fri Sep 28, 2018 12:24 am


Postby Karina Koo 2H » Mon Feb 11, 2019 7:00 pm

Can someone just conceptually explain what enthalpy is? I still dont quite get it because according to the textbook, enthalpy is a state function that keeps track of losses of energy as expansion work during heat transfer at constant pressure. So I would think enthalpy as something to do with work. but the textbook also states that change in enthalpy is equal to the heat released or absorbed at constant pressure which has to do with heat instead. Thank you!

Adam Vuilleumier 2K
Posts: 60
Joined: Fri Sep 28, 2018 12:27 am

Re: enthalpy

Postby Adam Vuilleumier 2K » Mon Feb 11, 2019 7:27 pm

Enthalpy is the amount of heat energy in a system. It is equivalent to q when pressure is constant. So when a problem gives you the enthalpy instead of the q value, chances are that pressure is constant.

Posts: 60
Joined: Fri Sep 28, 2018 12:26 am

Re: enthalpy

Postby Cameron_Greenberg_3C » Sat Feb 16, 2019 8:47 pm

The chemistry definition of enthalpy is the amount of energy held in chemical bonds. Bond enthalpy problems prove this fact as the breaking and forming of bonds sum up the change in enthalpy.

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

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