1.

The values of Delta H and Delta S for the reaction. C("graphite") + CO_(2)(g) rarr 2CO(g) are 170 kJ and 170 JK^(-1), respectively. This reaction will be spontaneous at :

Answer»

910 K
1110 K
510 K
710 K

Solution :For a SPONTANEOUS process, `DELTA G` must be NEGATIVE.
Here, `Delta G` will be negative when `T delta S gt Delta H`
`Delta H = 170 kJ = 170000 J`
`Delta S = 170 JK^(-1) mol^(-1)`
`T Delta S gt Delta H` only when T = 1110 K


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