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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 `DeltaH lt TDeltaS`
or `T gt (DeltaH0/(DeltaS)`
i.e., `(108800" "Jmol^(-1))/(190" JK"^(-1)mol^(-1))`
i.e., 573K or `300^(@)C`.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-PRACTICE SET 03-PAPER 1 (PYSICS & CHEMISTRY)
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  12. Heat of solution is defined as

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