Midterm 6B






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AlyssaYeh_1B
Posts: 100
Joined: Sat Aug 17, 2019 12:16 am

Midterm 6B

Postby AlyssaYeh_1B » Sat Mar 14, 2020 2:47 pm

I was wondering how we'd be able to answer this question without having any data for calculations

For which process will deltaH nought and deltaG nought be expected to be most similar?
(A) 2Al(s) + Fe2O3(s) --> 2Fe(s) + Al2O3(s)
(B) 2Na(s) + 2H2O(l) --> 2NaOH(aq) + H2(g)
(C) 2NO2(g) --> N2O4(g)
(D) 2H2(g) + O2(g) --> 2H2O(g)

Andrew Pfeiffer 2E
Posts: 101
Joined: Sat Sep 28, 2019 12:16 am

Re: Midterm 6B

Postby Andrew Pfeiffer 2E » Sat Mar 14, 2020 2:58 pm

A is the correct answer because Al and Fe undergo a simple redox reaction, with relatively low values of deltaH nought and deltaG nought. All of the other options have multiple phases or have unbalanced molar distributions, creating variety in the deltaG nought and deltaH nought.


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