4D23

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Jina Kwon
Posts: 100
Joined: Fri Aug 09, 2019 12:15 am

4D23

Postby Jina Kwon » Sat Feb 08, 2020 5:48 pm

For this problem, where did N2(g) + (5/2)(O2) (g) --> N2O5(g) come from?
Why do we need to find this when we're trying to find the enthalpy of formation of N2O5?

ShastaB4C
Posts: 100
Joined: Thu Sep 26, 2019 12:18 am

Re: 4D23

Postby ShastaB4C » Sat Feb 08, 2020 5:52 pm

It’s easier to keep the coefficients in whole numbers and multiply the first equation they have by 2

ShastaB4C
Posts: 100
Joined: Thu Sep 26, 2019 12:18 am

Re: 4D23

Postby ShastaB4C » Sat Feb 08, 2020 5:53 pm

And then add the standard enthalpy of formation for NO. Just don’t forget to multiply that value by the coefficient of NO in the desired equation.


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