Standard formation deltaH

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Netpheel Wang 4L
Posts: 60
Joined: Fri Sep 28, 2018 12:15 am

Standard formation deltaH

Postby Netpheel Wang 4L » Mon Feb 04, 2019 12:16 pm

I'm confused with what exactly deltaH of formation means and how we apply it/use it

Julia Lung 1I
Posts: 30
Joined: Fri Jun 23, 2017 11:39 am

Re: Standard formation deltaH

Postby Julia Lung 1I » Mon Feb 04, 2019 2:35 pm

Standard Enthalpy of Formation (deltaH) is the most stable form of a molecule. You would use: ΔH(of formation) = Sum of ΔH(of formation of products) - ΔH(of formation of reactants). This is the 3rd method to find enthalpy changes from last weeks lecture.

Sarah Kiamanesh 1D
Posts: 30
Joined: Fri Sep 28, 2018 12:22 am

Re: Standard formation deltaH

Postby Sarah Kiamanesh 1D » Tue Feb 05, 2019 3:38 pm

delta H of formation is the change in enthalpy during the formation of one mole of the substance from its constituent elements. It's used in calculating the change in enthalpy of a reaction, where we calculate the delta formation of the products and subtract that of the reactants from it.

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

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