4/28/2017 oso00 PM 59.1/100 G 4/28/2017 12:21 PM te Print l Calculator Periodic

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4/28/2017 oso00 PM 59.1/100 G 4/28/2017 12:21 PM te Print l Calculator Periodic Table Question 17 of 23 Sapling Learning when the oxide of generic metal Miss heated at 25.0 c,only a negligible amount of M is produced. (s) MO AG 286.2 kJ mol When this reaction is coupled to the conversion of graphite to carbon dioxide, it becomes spontaneous. What is the chemical equation of this ooupled process? Show that the reaction is in equilibrium, include physical states, and represent graphite as C(s What is the thermodynamic equilbrium constant for the coupled reaction? Number K- 6.95 x 10 Grade boe

Explanation / Answer

couple with

C(s) + O2(g) --> CO2(g) dG° = -394.39 kJ/mol

this will be spontaneous

find the equation

add both equations

C(s) + O2(g) + MO2(s) <--> M(s) + O2(g) + CO2(g)

cancel common terms

C(s) + MO2(s) <--> M(s) + CO2(g)

dG = 286.2 +  -394.39 = -108.19 kJ/mol

for K

dG = -RT*ln(K)

K = exp(-dG/(RT))

K = exp((108.19*10^3)/(8.314*298))

K = 9.2185*10^18

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