Different methods

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AMahadi
Posts: 93
Joined: Thu Jul 11, 2019 12:17 am

Different methods

Postby AMahadi » Sat Jan 25, 2020 5:12 pm

How do you know which method to use to calculate ΔH?

DanielTalebzadehShoushtari2A
Posts: 53
Joined: Fri Aug 02, 2019 12:16 am

Re: Different methods

Postby DanielTalebzadehShoushtari2A » Sat Jan 25, 2020 5:18 pm

You will be able to tell which method to use based on what information you are given in a problem. If you are given values of bond enthalpies, you will use that method. If you are given standard enthalpies of formation, use that method. If you are given the enthalpy values for certain reactions that can be combined to produce the one you are looking for, use Hess's Law.

madawy
Posts: 81
Joined: Fri Aug 09, 2019 12:17 am

Re: Different methods

Postby madawy » Sat Jan 25, 2020 5:18 pm

I suppose it’ll be based off of the information given and parameters of the question/experiment !!

rabiasumar2E
Posts: 108
Joined: Thu Jul 11, 2019 12:15 am

Re: Different methods

Postby rabiasumar2E » Sat Jan 25, 2020 6:36 pm

What the question contains will help determine what method you should use!

Sydney Myers 4I
Posts: 100
Joined: Fri Aug 09, 2019 12:17 am

Re: Different methods

Postby Sydney Myers 4I » Sat Jan 25, 2020 7:13 pm

A factor that may play into which method to use is if the reaction you're trying to find the enthalpy of occurs in standard states. If not, you may not be able to use standard reaction enthalpy of formation.


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