Evaporation and Boiling
Chemistry ⇒ States of Matter
Evaporation and Boiling starts at 7 and continues till grade 12.
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See sample questions for grade 11
A 50 mL sample of water is left in an open dish in a room at 30°C and 40% humidity. If the humidity increases to 80%, what will happen to the rate of evaporation?
A beaker contains 100 mL of water at 25°C. If the surface area is doubled, what happens to the rate of evaporation?
A liquid is heated in a closed container. What happens to the boiling point as the vapor pressure inside increases?
Calculate the boiling point of water at 0.8 atm, given that the normal boiling point is 100°C at 1 atm. (Assume the boiling point decreases by about 10°C for every 0.2 atm decrease in pressure.)
Describe the role of intermolecular forces in determining the boiling point of a liquid.
Describe what happens to the boiling point of water at high altitudes and explain why.
Explain the difference between evaporation and boiling in terms of temperature and location within the liquid.
Explain why clothes dry faster on a windy day.
Explain why pressure cookers are used for cooking at high altitudes.
Explain why volatile liquids evaporate more quickly than non-volatile liquids.
The boiling point of ethanol is 78.4°C at 1 atm. What will happen to its boiling point if the external pressure is increased to 2 atm?
