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Questions and Answers
What effect does an increase in temperature generally have on the viscosity of a liquid?
What effect does an increase in temperature generally have on the viscosity of a liquid?
- Increases viscosity
- Decreases viscosity (correct)
- Causes viscosity to fluctuate unpredictably
- Has no effect on viscosity
How does the strength of attractive forces in a liquid relate to its vapor pressure?
How does the strength of attractive forces in a liquid relate to its vapor pressure?
- Stronger forces result in a lower vapor pressure (correct)
- Stronger forces result in a higher vapor pressure
- Weaker forces result in a lower vapor pressure
- Vapor pressure is unaffected by attractive forces
What causes surface tension in liquids?
What causes surface tension in liquids?
- The temperature of the liquid
- Attraction between interior and exterior molecules (correct)
- The density of the liquid
- Molecular weight of the liquid
What happens when the vapor pressure of a liquid equals atmospheric pressure?
What happens when the vapor pressure of a liquid equals atmospheric pressure?
What is the relationship between the boiling point of a liquid and its attractive forces?
What is the relationship between the boiling point of a liquid and its attractive forces?
Flashcards
Viscosity
Viscosity
The resistance to flow in a liquid, influenced by molecular friction and attractive forces.
Surface Tension
Surface Tension
The force of attraction between molecules at the surface of a liquid, causing phenomena like droplet formation.
Vapor Pressure
Vapor Pressure
The pressure exerted by gas above a liquid in equilibrium with its vapor; increases with temperature.
Effect of Temperature on Viscosity
Effect of Temperature on Viscosity
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Effect of Temperature on Surface Tension
Effect of Temperature on Surface Tension
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Study Notes
Liquid Properties
- Liquids have attractive forces that allow particles to stay close but allows free movement.
- Particles' energy doesn't overcome attractive forces completely to escape.
- Boiling point depends on the strength of attractive forces.
Viscosity
- Viscosity measures a liquid's resistance to flow.
- Viscosity is caused by friction between moving molecules.
- Higher attractive forces result in higher viscosity.
- Higher temperatures cause lower viscosity.
Surface Tension
- Surface tension is the attraction between liquid surface molecules.
- Surface tension creates droplets, capillary action, and allows certain insects to walk on water.
- Higher attractive forces result in higher surface tension.
- Higher temperatures cause lower surface tension.
Vapor Pressure
- Vapor pressure is the gas pressure above a liquid in a closed system when evaporation and condensation balance.
- All liquids evaporate as particles escape the surface.
- Higher temperatures result in higher vapor pressure.
- Boiling occurs when vapor pressure equals atmospheric pressure.
- Higher attractive forces result in lower vapor pressure at any given temperature and higher boiling point.
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