bond enthalpies

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Ekayana Sethi 2K
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bond enthalpies

Postby Ekayana Sethi 2K » Sun Jan 21, 2018 9:04 pm

In lecture Professor Lavelle said something about converting all products and reactants into gas form to use bond enthalpies. I did not understand what he meant. How do we convert something into gas?

Peri Bingham 1G
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Joined: Fri Sep 29, 2017 7:03 am

Re: bond enthalpies

Postby Peri Bingham 1G » Sun Jan 21, 2018 9:06 pm

To convert the bond enthalpies into a gas, you must add the enthalpy of vaporization (if going from liquid to gas) or the enthalpy of sublimation (if going from solid to gas).

Clarisse Wikstrom 1H
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Re: bond enthalpies

Postby Clarisse Wikstrom 1H » Sun Jan 21, 2018 9:44 pm

In addition, you must do this because it would take much more energy to break the bonds for liquid or solid compounds... the bond enthalpies would extremely high.

lindsay lathrop 2C
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Re: bond enthalpies

Postby lindsay lathrop 2C » Sun Jan 21, 2018 9:46 pm

We have to consider it in a gas form because bond enthalpy is the dissociation of a species in its gas phase. Therefore we have to use the vaporization or sublimation values because that is how liquids and solids become gases respectively

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