1.

For the reaction CO(g)+1/2 O_(2) (g) rarr CO_(2)(g) using data given in table find out incorrect statement(s) among the following. {:(,DeltaH_(f)^(@)"(kJ/mole)",S^(@)"(J/Kmole)"),(CO(g),-110,+197),(O_(2)(g),0,+205),(CO_(2)(g),-395,+213):} Assume vibration modes of motion do not contribute to heat capacity at low temperature.

Answer»

<P>`DeltaH^(@) gt DeltaU^(@)` for the reaction at 298 K.
In standard state condition, the reaction `CO(g)+1/2 O_(2) (g) rarr CO_(2)(g)` attain equilibrium at very high temperature.
At low temperature `(D(DELTA H)^(@))/(dT) = - ve`
In a `CO, O_(2)` fuel cell electrical ENERGY obtained by cell `gt |Delta H_("COMBUSTION")^(@) [CO (g)]|`

Solution :`DeltaH^(@)-DeltaU^(@)=Deltan_(g)RT`
since `Deltan_(g)=-ve`
`rArr DeltaH^(@)-DeltaU^(@) le 0`
`DeltaH^(@)=-ve`
`DeltaS^(@)=-ve"",""C_(p)=3/2R+R"",""=5/2 R"",""Delta_(r)C_(p)=-ve`


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