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July 6, 2015

Homework Help: Chemistry

Posted by Kat on Thursday, March 8, 2012 at 10:34pm.

Which of the following reactions are spontaneous (favorable)?
A] 2Mg(s) + O2(g) -> 2MgO(s) Delta G = -1137 kJ/mol ..
B] NH3(g) + HCl(g) -> NH4Cl(s) Delta G = -91.1 kJ/mol ...
C] AgCl(s) -> Ag+(aq) + Cl-(aq) Delta G = 55.6 kJ/mol ..
D] 2H2(g) + O2(g) -> 2H2O(g) Delta G = 456 kJ/mol
E] C(s) + H2O(l) -> CO(g) + H2(g) Delta G = 90.8 kJ/mol
F] CH4(g) + 2O2 -> CO2(g) + 2H2O(l) Delta G = -820 kJ/mol


I said that reaction A, B, and F were spontaneous because my book said spontaneity occurs when Delta G < 0 ... but theres also an example of a dissociation equation being spontaneous.. does that mean that reaction C is also spontaneous?

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