Q.
Given the following data Determine at what temperature the following reaction is spontaneous ?FeO(s) + C (Graphite) →Fe(s) + CO (g)
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a
298 K
b
668 K
c
964 K
d
∆G0 is +ve, hence the reaction will never be spontaneous
answer is C.
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Detailed Solution
∆G=∆H-T∆S ∆H=∑∆HP- ∑∆HR ∆H=-110.5+266.3=155.8 kJ ∆S=∑SP- ∑SR ∆S=197.6+27.28-57.5+5.74=161.64 J/mol KFor reaction to be spontaneous, ∆G < 0∆H -T∆S< 0 T > ∆H∆S=155800161.64=964 K
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