Question

`DeltaHltDeltaU` for the reaction(s) :
A. `N_(2)(g)+3H_(2)(g)rarr2NH_(3)(g)`
B. `Ag_(2)O(s)rarr2Ag(s)+(1)/(2)O_(2)(g)`
C. `CO(g)+(1)/(2)O_(2)(g)rarrCO_(2)(g)`
D. `C(s)+O_(2)(g)rarrCO_(2)(g)`

Answer 1

Correct Answer - A::C
`DeltaH=DeltaU+Deltan_(g)RT`
`(a) Deltan_(g)=-2" "DeltaUgtDeltaH`
`(b) Deltan_(g)=+(1)/(2)" "DeltaUgtDeltaH`
`(c )Deltan_(g)=-(1)/(2)" "DeltaU gt DeltaH`
`(d) Deltan_(g)=0 " "DeltaU=DeltaH`