For the reaction $FeCO_{3(s)} \to FeO_{(s)} + CO_{2(g)}$,$\Delta H = 82.8 \ kJ$ at $25 \ ^{\circ}C$. What is $\Delta U$ at $25 \ ^{\circ}C$ in $kJ$?

  • A
    $82.8$
  • B
    $80.32$
  • C
    $-2349.77$
  • D
    $85.28$

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