Question

For which of the following equations, will `DeltaH` be equal to `DeltaU`?
A. `H_(2)(g)+1//2O_(2)(g) rarr H_(2)O(l)`
B. `H_(2)(g)+I_(2)(g)rarr 2HI(g)`
C. `2NO_(2)(g)rarr N_(2)O_(4)(g)`
D. `4NO_(2)(g)+O_(2)(g) rarr 2N_(2)O_(5)(g)`

Answer 1

`DeltaH = DeltaU +DeltanRT`
`In (b), Deltan = 0`
`:. DeltaH = DeltaU`