For $1 \text{ mole}$ of an ideal gas expanding isothermally from $1 \text{ L}$ to $10 \text{ L}$ at $300 \text{ K}$,the value of $\Delta U$ is: $(R = 2 \text{ cal mol}^{-1} \text{ K}^{-1})$
- A$163.7 \text{ cal}$
- B$0 \text{ cal}$
- C$1381.1 \text{ cal}$
- D$9 \text{ L-atm}$
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