Different enthalpy calculation methods

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105169446
Posts: 32
Joined: Fri Sep 28, 2018 12:16 am

Different enthalpy calculation methods

Postby 105169446 » Sun Jan 27, 2019 11:20 pm

Are there specific cases in which we should use one of the three methods over the others to calculate delta H?

deepto_mizan1H
Posts: 65
Joined: Fri Sep 28, 2018 12:16 am

Re: Different enthalpy calculation methods

Postby deepto_mizan1H » Mon Jan 28, 2019 9:55 am

I think it depends on what information we are given for the calculation. If we are given something with a step by step enthalpy for each step, we could use Hess's method, but if we aren't given the enthalpies for each step of the total reaction then we might decide on using the bond enthalpies to sum it (though less accurate). We should try to do it in what would be the most accurate.

Jonny Schindler 1A
Posts: 30
Joined: Fri Sep 28, 2018 12:20 am

Re: Different enthalpy calculation methods

Postby Jonny Schindler 1A » Mon Jan 28, 2019 11:08 am

There will usually be one clear method to used based on the information provided by the problem. If Hess's method can be used, it is the most accurate method.

Angela Cong 3C
Posts: 69
Joined: Fri Sep 28, 2018 12:25 am

Re: Different enthalpy calculation methods

Postby Angela Cong 3C » Tue Jan 29, 2019 10:31 am

The information present in the question given will allow you to determine which method to use

daniella_knight1I
Posts: 57
Joined: Fri Sep 28, 2018 12:18 am

Re: Different enthalpy calculation methods

Postby daniella_knight1I » Tue Jan 29, 2019 11:51 am

Use the information given in the problem to select the most adequate method to calculate the answer.


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