18 Questions
How does the rate of evaporation change with an increase in surface area?
The rate of evaporation increases with an increase in surface area.
What effect does an increase in temperature have on the rate of evaporation?
An increase in temperature leads to a higher rate of evaporation.
How does humidity affect the rate of evaporation?
A decrease in humidity results in an increase in the rate of evaporation.
Explain the impact of wind speed on the evaporation process.
Increasing wind speed accelerates the evaporation process.
What factors affect the rate of evaporation?
Surface area, temperature, humidity, and wind speed.
Why do clothes dry faster on a windy day?
Clothes dry faster on a windy day because the wind carries away water vapor particles, speeding up the evaporation process.
How does evaporation affect the temperature of the surroundings?
Evaporation makes the surroundings cold.
What happens when acetone (nail polish remover) is poured on the palm?
The palm feels cool due to evaporation of acetone.
Give examples from daily life where we can feel the cooling effect of evaporation.
Examples could include sweating, sprinkling water on hot surfaces, etc.
Explain why wearing cotton clothes is beneficial in summer.
Cotton helps absorb sweat and aids in its evaporation, keeping the body cool.
What happens when water droplets form on the outer surface of a glass containing ice-cold water?
Water droplets form due to condensation of water vapor in the air on the cold glass surface.
In what way does evaporation help in cooling surfaces during hot weather?
Evaporation absorbs latent heat from the surface, reducing its temperature.
Explain the difference between deposition, boiling, and evaporation.
Deposition is the change of gaseous state directly to solid state without going through liquid state. Boiling is a bulk phenomenon where particles from the bulk of the liquid change into vapor state. Evaporation, on the other hand, is a surface phenomenon where particles from the surface gain enough energy to overcome the forces of attraction and change into vapor state.
What factors affect the rate of evaporation?
The rate of evaporation depends on the surface area exposed to the atmosphere, temperature, humidity, and wind speed.
Define latent heat of vaporization and latent heat of fusion.
Latent heat of vaporization is the heat energy required to change 1 kg of a liquid to gas at atmospheric pressure at its boiling point. Latent heat of fusion is the amount of heat energy required to change 1 kg of solid into liquid at its melting point.
What are the units for temperature, length, mass, weight, volume, density, and pressure?
Temperature: Kelvin, Length: Meter, Mass: Kilogram, Weight: Newton, Volume: Cubic meter, Density: Kilogram per cubic meter, Pressure: Pascal
Explain why naphthalene balls disappear with time without leaving any solid.
Naphthalene balls undergo sublimation, where they change directly from solid to gas without passing through the liquid state.
Convert 293 K and 470 K to the Celsius scale.
293 K is 20°C and 470 K is 197°C.
Learn about the factors that influence the rate of evaporation, including surface area, temperature, and humidity. Understand how these factors impact the process of evaporation in everyday situations.
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