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
`{:(,Delta H_(f)^(@) (kJ//"mole"),S^(@) (J//K"mole"),),(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. `Delta H^(@) gt Delta U^(@)` for the reaction at 298 K
B. In standard state conditin, the rection `CO (g) + (1)/(2) O_(2) (g) rarr CO_(2) (g)` attain equilibrium at very hight 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^(@) lt 0`
`DeltaH^(@)=-ve`
`DeltaS^(@)=-ve" "," "C_(p)=3/2 R+R" "," "=5/2 R`
`Delta_(r)C_(p)=-ve`