Which of the following statements is true...

🔍 Key Concepts

• Saturated steam tables – know what each column represents (pressure, temperature, enthalpy of liquid, enthalpy of evaporation, enthalpy of vapor). • Difference between psig and psia (gauge vs absolute pressure) and how to convert between them. • How to find the latent heat of vaporization at a given pressure using the tabulated enthalpy values.

💭 Think About

• For option A, how do you convert 185.3 psig to absolute pressure, and what saturation temperature does the table show at that absolute pressure? Does it match the statement? • For option C, which two enthalpy columns must you compare to find how many BTUs are given up when steam condenses at 250 psia? What value do you get from the table? • Looking at the table headings, do you see any data that would let you directly calculate a volume change as stated in option B, or is something missing for that kind of calculation?

✅ Before You Answer

• Confirm all pressures are in the same basis before comparing (convert psig ↔ psia correctly). • Use the correct row for each stated pressure and read every column carefully—especially temperature and enthalpy of evaporation. • Check whether the table actually includes specific volume data anywhere before trusting a statement about volume change.

Which of the following statements is true concerning the information tabulated in the table? Illustration SG-0004

At 185.3 psig (1366.4 kPa), the saturation temperature of a mixture of water and steam is 377.51°F (192°C).

When one pound of water changes to one pound of steam at 200 psia (1378.8 kPa), its volume increases 124.41 times.

If one pound of steam at 250 psia (1723.5 kPa) condenses to one pound of water it will give up 843 BTU's (889.4 kJ) while changing state.

All of the above.

🔍 Key Concepts

💭 Think About

✅ Before You Answer