What is the total internal energy of 3.2 mol of an ideal monatomic gas at a temperature of 27∘C27^\circ\text{C}27∘C?
1.2×10−21 J1.2 \times 10^{-21}\text{ J}1.2×10−21 J
6.2×10−21 J6.2 \times 10^{-21}\text{ J}6.2×10−21 J
1.1×103 J1.1 \times 10^{3}\text{ J}1.1×103 J
1.2×104 J1.2 \times 10^{4}\text{ J}1.2×104 J
