A Container Having a Volume of 1

A container having a volume of 1.0 m³ holds 5.0 moles of helium gas at 50°C. If the helium behaves like an ideal gas, the total energy of the system is

A) 2.0 × 10⁴ J.
B) 2.5 × 10⁴ J.
C) 1.7 × 10³ J.
D) 1.5 × 10³ J.
E) 4.0 × 10⁴ J.