According to the illustrated steam tables,...

Question 1 of 2707066636ef128f7522a1c523513

According to the illustrated steam tables, what would be the latent heat of vaporization for boiler water if the auxiliary boiler was operating at 135.3 psig? Illustration SG-0004

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Question 1 of 27070

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According to the illustrated steam tables, what would be the latent heat of vaporization for boiler water if the auxiliary boiler was operating at 135.3 psig? Illustration SG-0004

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🔍 Key Concepts

• Difference between psig (gauge pressure) and psia (absolute pressure)** • Where to find latent heat of vaporization in Table 2 – Thermodynamic Properties of Saturated Steam (Pressure) • Meaning of enthalpy of evaporation vs enthalpy of liquid and enthalpy of vapor

💭 Think About

• How do you convert the boiler pressure given in psig to the absolute pressure values listed in the steam table? • Once you have the correct absolute pressure, which column in Table 2 represents the latent heat of vaporization? • Compare the value you read from that column with the answer choices—does one match closely without needing interpolation?

✅ Before You Answer

• Be sure you add atmospheric pressure (about 14.7 psi) to convert from psig to psia before entering the table. • Confirm you are using Table 2 (pressure-based), not Table 1 (temperature-based). • Verify you are reading from the Enthalpy (BTU/lb) of Evaporation column, not the liquid or total vapor enthalpy columns.