In a particular reaction, $4 \text{ kJ}$ of heat is released by the system and $12 \text{ kJ}$ of work is done on the system. Calculate the $\Delta H$ and $\Delta U$.

• A
  $\Delta H = 4 \text{ kJ}$ and $\Delta U = 16 \text{ kJ}$
• B
  $\Delta H = -4 \text{ kJ}$ and $\Delta U = 8 \text{ kJ}$
• C
  $\Delta H = -4 \text{ kJ}$ and $\Delta U = -16 \text{ kJ}$
• D
  $\Delta H = 4 \text{ kJ}$ and $\Delta U = -16 \text{ kJ}$