Given the following data `{:("Substance",DeltaH^(@)(KJ//mol),S^(@)(J//mol K),DeltaG^(@)(kJ//mol),),(FeO(s),-266.3,57.49,-245.12,),(C("Graphite"),0,5.7

Question

Given the following data `{:("Substance",DeltaH^(@)(KJ//mol),S^(@)(J//mol K),DeltaG^(@)(kJ//mol),),(FeO(s),-266.3,57.49,-245.12,),(C("Graphite"),0,5.7

Given the following data
`{:("Substance",DeltaH^(@)(KJ//mol),S^(@)(J//mol K),DeltaG^(@)(kJ//mol),),(FeO(s),-266.3,57.49,-245.12,),(C("Graphite"),0,5.74,0,),(Fe(s),0,5.74,0,),(CO(g),-110.5,197.6,-137.15,):}`
Determine at what temperature the following reaction is spontaneous?
`FeO(s)+C("Graphite")rarrFe(s)+CO(g)`
A. `298 K`
B. `668 K`
C. `966 K`
D. `Delta G^(@)` is `+ve` hence the reaction will never be spontaneous

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - C
(1)`Delta H=0+[-110.5]-(-266.3)`
`= -110.5+266.3`
`= +155.8 KJ//"mole"`
(2) `Delta S= 27.28+197.6-57.49-5.74=161.65 J//"mole"`
(3) `Delta G=Delta H-T Delta S=0 =155.8-Txx161.65xx10^(-3)`
`Txx161.65xx10^(-3)=155.8 rArr T=963.8K`

5 views Answered 2023-02-05 15:29