🔍 Key Concepts
• Use the Properties of Saturated Steam table to relate vacuum (pressure) and temperature at saturation.
• Understand what is meant by saturated liquid, mixture of saturated liquid and vapor, subcooled liquid, and superheated vapor in relation to the saturation line.
• Compare the given temperature at 25.03 in Hg vacuum with the saturation temperature listed in the table for that same vacuum.
💭 Think About
• Find the saturation temperature that corresponds to a gauge vacuum of 25.03 inches Hg in the table. How does that temperature compare to 126.08°F?
• At a fixed pressure, what does it mean physically if the actual temperature is lower than, equal to, or higher than the saturation temperature from the table?
• Which of the four answer choices matches the condition where the fluid is below, on, or above the saturation line on a T–P diagram at that pressure?
✅ Before You Answer
• Identify the exact saturation temperature at 25.03 inches Hg gauge from the illustration.
• Determine whether 126.08°F is less than, equal to, or greater than that saturation temperature.
• Match that comparison to the correct definition: saturated, mixture on the saturation line, subcooled (compressed) liquid, or superheated vapor at the specified pressure.