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Assume the reaction is carried out in an...

Assume the reaction is carried out in an open system for which reaction will `Delta H=Delta U`?

A

`C(S)+2H_2O(g)rarr2H_2(g)+CO_2(g)`

B

`PCl_5(g)rarr PCl_3(g)+Cl_2(g)`

C

`2CO(g)+O_2(g)rarr2CO_2(g)`

D

`H_2(g)+Br_2(g)rarr2HBr(g)`

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The correct Answer is:
C
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