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Evaporation Concepts Quiz

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Questions and Answers

What is the process by which molecules on the surface of a liquid break away and go into the gas phase?

Sublimation
Vaporization
Evaporation (correct)
Condensation

In a closed container, what is established when molecules return to the liquid at the same rate as they leave it?

Equilibrium between liquid and vapor (correct)
Formation of a vacuum
Complete vaporization of the liquid
Increased rate of evaporation

What depends on temperature in the same way for molecules in liquids as it does for molecules in gases?

Potential energies
Electrostatic forces
Atomic number
Kinetic energies (correct)

At a lower temperature, why is evaporation slower and the equilibrium vapor pressure lower?

A smaller fraction of the molecules have the energy required to escape from the liquid (C) Signup and view all the answers

What must molecules possess to break away from the liquid during evaporation?

At least some minimum kinetic energy (B) Signup and view all the answers

What is evaporation?

The process by which molecules on the surface of a liquid break away and go into the gas phase (C) Signup and view all the answers

What happens in a closed container during equilibrium?

Molecules return to the liquid at the same rate as they leave it (C) Signup and view all the answers

What affects the kinetic energies of molecules in liquids?

Temperature (B) Signup and view all the answers

How does temperature affect evaporation?

At higher temperatures, a greater fraction of molecules have the energy required to escape from the liquid (B) Signup and view all the answers

What is the relationship between lower temperature and evaporation?

At lower temperature, a smaller fraction of the molecules have the energy required to escape from the liquid, so evaporation is slower (A) Signup and view all the answers