Question

The values of `DeltaH` and `DeltaS` for the reaction, `C_(("graphite"))+CO_(2(g))rarr2CO_((g))` are 170 kJ and 170 `JK^(-1)`, respectively. This reaction will be spontaneous at
A. 710 K
B. 910 K
C. 1110 K
D. 510 K

Answer 1

Correct Answer - C
`DeltaG=DeltaH-TDeltaS`
`0=(170xx10^(3)J)-T(170 JK^(-1))`
T=1000 K
For spontaneity, `DeltaG` is -ve
Hence T should be `gt` 1000 K/