Question

`(Delta H - Delta U)` for the formation of carbon monoxide `(CO)` from its elements at `298K` is
`(R = 8.314 K^(-1)mol^(-1))`
A. `-1238.78J" "mol^(-1)`
B. `1238.78J" "mol^(-1)`
C. `-2477.57J" "mol^(-1)`
D. `2477.57J" "mol^(-1)`

Answer 1

Correct Answer - B
`C(s)+(1)/(2)O_(2)(g)toCO(g)" "Deltan_(g)=1-(1)/(2)=(1)/(2)`
`DeltaH-DeltaU=DeltanRT`
`=(1)/(2)x8.314xx298=1238.786JJ" "mol^(-1)`