Where is the latent heat obtained to create...

🔍 Key Concepts

• Trace the feed water flow path on the MO-0111 drawing and note which components it passes through just before evaporation occurs. • Recall that latent heat of vaporization is transferred where a hotter vapor or steam is condensing on a surface while the feed water is turning to vapor on the other side. • Identify which numbered items are preheaters (raising temperature only – sensible heat) versus those that are the evaporating/heating surface in direct contact with the boiling feed water.

💭 Think About

• Follow the line carrying seawater/feed water: through which components (3, 20, 23, 24) does it pass, and in what order, before it becomes vapor? • Among devices 3, 20, 23, and 24, which one is clearly shown as the heating surface inside the distiller shell where boiling/evaporation actually occurs, rather than just control or preheating? • Where on the diagram is the heating steam or hot vapor supplied and then condensed? Match that location to the answer choices.

✅ Before You Answer

• Verify which component is inside the evaporator body (the large vessel outline) – this is likely where boiling and latent heat transfer occur. • Confirm which component receives heating steam or vapor (look for steam supply/condensate return lines) – this is your source of latent heat. • Make sure you distinguish between sensible heating (temperature rise with no phase change, such as in a feed-water heater or control valve) and latent heating (phase change from liquid to vapor).

Where is the latent heat obtained to create vapor from the feed water in the illustrated distiller? Illustration MO-0111

During its contact period with heat exchanger "3".

Only as it passes through device "20".

From having passed through "23".

While it is in contact with device "24".

🔍 Key Concepts

💭 Think About

✅ Before You Answer