Solving for a reaction's enthalpy

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Zenita Leang 2K
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Joined: Fri Sep 28, 2018 12:28 am

Solving for a reaction's enthalpy

Postby Zenita Leang 2K » Sun Jan 27, 2019 4:54 pm

In lecture, we were shown the three different ways to solve for enthalpy (Hess' Law, bond enthalpies, and standard enthalpy). Can these 3 methods be used interchangeably to solve or is one method preferable to the other?

Te Jung Yang 4K
Posts: 63
Joined: Fri Sep 28, 2018 12:18 am

Re: Solving for a reaction's enthalpy

Postby Te Jung Yang 4K » Sun Jan 27, 2019 5:03 pm

In lecture, Dr. Lavelle said that bond enthalpies were the least accurate way of finding a reaction's change of enthalpy as they are average values.

Having said that, I would assume that the other two are preferable as they are more specific to the reaction you are trying to solve.

Edward Xie 2E
Posts: 63
Joined: Fri Sep 28, 2018 12:23 am

Re: Solving for a reaction's enthalpy

Postby Edward Xie 2E » Sun Jan 27, 2019 5:03 pm

Using bond enthalpies is the least preferable method because it is the least accurate.


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