Question

The values of `DeltaH` and `DeltaS` for the reaction
`C("graphite")+CO_(2)(g)to2CO(g)` are `170 kJ` and `170 JK^(-1)` respectively. The reaction will be spontaneous at
A. 510 K
B. 170K
C. 910K
D. 1110K

Answer 1

Correct Answer - D
For a spontaneous reaction
`DeltaG=-ve `
Or ar eq. `DeltaG=0`
`Delta H=T DeltaS `
`T=(DeltaH)/(DeltaS)`
`=(170xx10^(3))/(170)`
`=1000K`