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. `1238.78 J mol^(-1)`
B. `2477.57 J mol^(-1)`
C. `2477.57 J mol^(-1)`
D. `-1238.78 J mol^(-1)`

Answer 1

Correct Answer - A
`DeltaH-DeltaU= Deltan_(g)"RT"" "C(s) + 1//2 O_(2)(g)rarr Co(g)`
`DeltaN_(g) = 1 -(1)/(2) =+(1)/(2) " "DeltaH-DeltaU =(1)/(2) xx 8.314 xx 298 = 1238.78 J mol^(-1)`