A system performs work $\Delta W$ when an amount of heat is$\Delta Q$ added to the system, the corresponding change in the internal energy is $\Delta U$. A unique function of the initial and final states (irrespective of the mode of change) is
  • A$\Delta Q$
  • B$\Delta W$
  • C$\Delta U$ and $\Delta Q$
  • D$\Delta U$
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