Can a gas with a = 0 be liquefied?

Explanation

To determine whether a gas with \( a = 0 \) can be liquefied, we can analyze the situation step by step.

### Step-by-Step Solution:

1. **Understand the Van der Waals Equation**:
The Van der Waals equation for real gases is given by:
\[
P + \frac{aN^2}{V^2}(V - Nb) = NRT
...