For the reaction $C_{(s)} + \frac{1}{2}O_{2(g)} \to CO_{(g)}$ at constant $T$ and $P$,which of the following statements is correct?

  • A
    $\Delta H = \Delta U$
  • B
    $\Delta H < \Delta U$
  • C
    $\Delta H > \Delta U$
  • D
    $\Delta H$ is independent of the physical state of the reactants.

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