If a boiler generates saturated steam at...

Question 1 / 2066636ef128f7522a1c521001

Question 1 of 2066636ef128f7522a1c521001

If a boiler generates saturated steam at 75.3 psig, how much heat is required to change the water into steam if the feedwater temperature is 220°F? Illustration SG-0004

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Question 1 of 20

66636ef128f7522a1c521001

If a boiler generates saturated steam at 75.3 psig, how much heat is required to change the water into steam if the feedwater temperature is 220°F? Illustration SG-0004

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🔍 Key Concepts

• Use Table 2 – Thermodynamic Properties of Saturated Steam (Pressure) to find the properties at the boiler pressure converted to absolute pressure (psia). • Use Table 1 – Thermodynamic Properties of Saturated Steam (Temperature) to find the enthalpy of the feedwater at 220°F. • The required heat per pound is the difference in enthalpy between the final saturated steam at boiler pressure and the initial feedwater condition.

💭 Think About

• First, convert the given boiler pressure in psig to psia. Which row in Table 2 corresponds to that absolute pressure? • From that row, which enthalpy value represents the saturated steam (vapor), and which represents the saturated liquid? • From Table 1, what is the enthalpy of the liquid at 220°F, and how do you combine that with the Table 2 value to find the total heat added per pound of water?

✅ Before You Answer

• Be sure you are using absolute pressure (psia), not psig, when entering Table 2. • Confirm you are subtracting initial enthalpy (feedwater at 220°F) from final enthalpy (saturated steam at boiler pressure). • Double‑check that you picked the enthalpy of vapor (hg) at the boiler pressure, not the enthalpy of liquid (hf), for the final state.

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Question 1 of 20

If a boiler generates saturated steam at 75.3 psig, how much heat is required to change the water into steam if the feedwater temperature is 220°F? Illustration SG-0004

30.5 Btu/lb.

290.6 Btu/lb.

862.8 Btu/lb.

997.2 Btu/lb.

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Question 1 / 2066636ef128f7522a1c521001

Question 1 of 2066636ef128f7522a1c521001

If a boiler generates saturated steam at 75.3 psig, how much heat is required to change the water into steam if the feedwater temperature is 220°F? Illustration SG-0004

Back

Question 1 of 20

66636ef128f7522a1c521001

If a boiler generates saturated steam at 75.3 psig, how much heat is required to change the water into steam if the feedwater temperature is 220°F? Illustration SG-0004

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed