Final answer:
The statement about water being in a saturated vapor state at 4 bar is likely false because, without specific temperature context, water at a pressure of 4 bar (significantly higher than 75 torr) is typically in a liquid state, not vapor.
Step-by-step explanation:
The question posits a scenario where water is initially at a saturated vapor state at a pressure of 4 bar. However, based on the provided reference materials, particularly the saturation values, we know that water's state at certain temperatures and pressures can vary greatly. The state of water as vapor, liquid, or solid depends on its temperature and pressure conditions. At 40 °C, water becomes a vapor at low pressures and converts into a liquid at pressures above approximately 75 torr, as per the given reference. On the other hand, at a pressure of 4 bar, which is significantly higher than 75 torr (since 1 bar is equivalent to 750.06 torr), one would expect the water to be in a liquid state and not saturated vapor, considering the temperature is not mentioned to be exceptionally high. Therefore, the statement 'Water initially saturated vapor at 4 bar' without additional context such as temperature is ambiguous and likely to be false.