The vapor pressure of a gas is defined as...

Question 1 of 270705eccef9ebacbc34ba4d465ed

The vapor pressure of a gas is defined as the pressure necessary to keep it in what state?

Back

Question 1 of 27070

Q

The vapor pressure of a gas is defined as the pressure necessary to keep it in what state?

🔍 Key Concepts

• Vapor pressure is related to how a liquid and its vapor coexist in a closed container • Think about what condition is needed so that a substance does NOT change phase any further (no more net evaporation or condensation) • How gases become liquefied under pressure in tanks on ships carrying liquefied gases

💭 Think About

• If you have a closed tank partly filled with a liquid gas (like propane), what does the pressure inside the tank represent in terms of vapor and liquid? • At equilibrium, when the rate of evaporation equals the rate of condensation, what physical quantity describes this balance? • Which of the options describes the phase that requires enough pressure to prevent further vaporization in a closed system?

✅ Before You Answer

• Match the definition of vapor pressure with the idea of equilibrium between liquid and its vapor • Eliminate options that are not a common phase (state of matter) involved in typical gas/liquid cargo operations • Focus on the phase that is maintained by applying pressure so that the substance does not boil off freely at a given temperature