A vapor under pressure stays in contact...

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Question 1 of 205eccef9fbacbc34ba4d46c0a

A vapor under pressure stays in contact with, and at the same temperature as the liquid from which it was generated. The vapor and liquid in this situation are, therefore, said to be in a/an __________.

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🔍 Key Concepts

• Phase changes between liquid and vapor (boiling/evaporation and condensation) • Meaning of saturation vs superheated vapor • What happens when vapor and liquid are at the same temperature and pressure in a closed space

💭 Think About

• When a vapor is sitting on top of its own liquid at the same temperature, is it still gaining heat or has heat transfer balanced out? • In this condition, is the vapor ready to condense with a small cooling, or does it need a lot of cooling first? • Which option describes a stable balance between evaporation and condensation, rather than an extreme high‑temperature condition?

✅ Before You Answer

• Make sure the term you choose implies a balanced, stable condition between liquid and vapor. • Eliminate any option that suggests the vapor is hotter than the liquid or well above its boiling point at that pressure. • Check which term is normally used in thermodynamics when the rate of evaporation equals the rate of condensation.

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