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For the reduction of lead oxide by coke ...

For the reduction of lead oxide by coke `(PbO+C rarr Pb+CO), Delta H` and `Delta S` are found to be `108.8 kJ mol^(-1)` and `190 JK^(-1) mol^(-1)` respectively. The minimum temperature above which the reaction will be spontaneous will be

A

`100^@C`

B

`200^@C`

C

`300^@C`

D

`400 ^@C`

Text Solution

Verified by Experts

The correct Answer is:
C
`DeltaG=DeltaH-TDeltaSlt0" or " DeltaHltTDeltaS`
or `TDeltaSgtDeltaH " or " T gt (DeltaH)/(DeltaS) , i.e (108800Jmol^(-1))/(190JK^(-1)), i.e , 573K or 300^@C`
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