Answer
The claim is false.
Work Step by Step
$P_{R}=\frac{P}{P_{cr}}=\frac{3MPa}{5.08MPa}=0.591$
$T_{R}=\frac{T}{T_{cr}}=\frac{160K}{154.8K}=1.034$
From Fig. A-15:
Z=0.79
Knowing that: $\upsilon=Z\upsilon_{idel}$
To determinate the error:
$e=\frac{\upsilon-\upsilon_{ideal}}{\upsilon}=1-\frac{1}{Z}=1-\frac{1}{0.79}=-0.2658=-26.58\%$
The claim is false.
