Q. A gas at 350 K and 15 bar has molar volume 20 percent smaller than that for an ideal gas under the same conditions. The correct option about the gas and its compressibility factor (Z) is :
A) Z > 1 and attractive forces are dominant
B) Z > 1 and repulsive forces are dominant
C) Z < 1 and attractive forces are dominant
D) Z < 1 and repulsive forces are dominant
Explanation
[Solution] $Z = V_{real}/V_{ideal} = 0.8 < 1$, indicating dominant attractive forces. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.