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in Chemistry by (80.8k points)
For which of the following change `Delta H!=Delta U`?
A. `H_(2)(g)+I_(2)+(g)rarr2HI(g)`
B. `HCl(aq)+NaOH(aq)rarrNaCl(aq)+H_(2)O(l)`
C. `C(s)+O_(2)(g)rarrCO_(2)(g)`
D. `N_(2)(g)+3H_(2)(g)rarr2NH_(3)(g)`

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