In a thermodynamic system,$\Delta U$ represents the increase in internal energy and $W$ represents the work done by the system. Which of the following statements is true?
- A$\Delta U = -W$ in an adiabatic process.
- B$\Delta U = W$ in an isothermal process.
- C$\Delta U = -W$ in an isothermal process.
- D$\Delta U = W$ in an adiabatic process.
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