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.

Options

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

Answer

A

Explanation

`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`