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Safari File Edit View History Bookmarks Window Help 55% D Wed 10:47 AM a E ezto.mheducation.com Chapter 14 Mail Abigail R Looper Outlook Updated July Events B&R; i k A Chemistry question I Cheg Chapter 14 instructions help X Question 17 (of 17) Save & Exit Submit Screen 2015-0 17. 10.000 points 1 out of 3 attempts it is favored at low temperature. Assistance It is favored at high temperatures. Check My Work It is never favored as written. View H Calculate AG for the overall reaction if this process is coupled to the conversion of sulfur to View Qu sulfur dioxide at 127 C. Use the table with formation constants to calculate your answer. Question Help Report a Problem kJ/mo Specie AH10 (kJ m0 AS (J/mo K) 32.1 Cu(s) 120.9 Cu2S(s) -79.5 205.2 96.8 248.2 eBook & Resources References

Explanation / Answer

You have missed the reaction.

But I will start with the following reaction.

Cu2S + O2 -----> 2Cu + SO2

delta Ho = (-296.8) - (-79.5) = -217.3 kJ/mol

delta So = (2 x 33 + 248.2) - (120.9 + 205.2) = -11.9 J/mol.K = -0.0119 kJ/mol.K

delta Go = delta Ho - T delta So

               = -217.3 - 400 x -0.0119

               = -212.54 kJ/mol

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