Question

The ratio of the actual molar volume of a gas to the ideal molar volume is _____ of the gas.

• A. co-volume
• B. van der Waals factor 'a'
• C. critical volume
• D. molar gas constant
• E. compressibility factor

Answer 1

Answer: (E)

The compressibility factor, denoted as \( Z \), is defined as the ratio of the actual molar volume of a gas to the ideal molar volume.

Mathematically, 

\( Z = \frac{V_{\text{m, actual}}}{V_{\text{m, ideal}}} \)

If the gas behaves ideally, \( Z = 1 \). For real gases, \( Z \) deviates from 1.

Correct Answer:

Compressibility factor