Chemistry - Real Gas Question with Solution | TestHub

Helium's Boyle temperature is far below 0°C, so at 0°C, Z = PV/nRT > 1 at all pressures — repulsions dominate throughout. At every volume, He exerts a higher pressure than an ideal gas at the same V and T; the He curve lies above the ideal hyperbola at all V: graph (c). Confirms Ans (c).