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The values of Delta H and Delta S for th...

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

A

910 K

B

1110 K

C

510 K

D

710 K

Text Solution

Verified by Experts

The correct Answer is:
B
`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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