1.

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

Answer»

910 K
1110 K
510 K
710 K

Solution :`Delta G = Delta H - T Delta S`
At equilibrium, `Delta G = 0`
`rArr 0 = (170 xx 10^(3) J ) - T(170 "JK"^(-1) )`
`rArr T= 1000K`
For SPONTANEITY, `Delta G ` is -ve, which is possible only if `T gt 1000` K.


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