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 12
A 50 g sample of ethanol (boiling point 78.4°C, latent heat of vaporization 841 J/g) is to be vaporized at its boiling point. Calculate the energy required.
A beaker contains 200 g of water at 100°C. How much energy is needed to convert all the water to steam? (Latent heat of vaporization = 2260 J/g)
A liquid is heated in a closed container. What will happen to the boiling point compared to an open container?
A sample of water boils at 95°C in a laboratory at high altitude. What does this indicate about the atmospheric pressure in the laboratory compared to sea level?
Calculate the energy required to evaporate 100 g of water at 100°C. (Latent heat of vaporization of water = 2260 J/g)
Describe the effect of atmospheric pressure on the boiling point of a liquid.
Describe the role of vapor pressure in the boiling of a liquid.
Describe what happens to the boiling point of water as you ascend to higher altitudes.
Explain the difference between evaporation and boiling in terms of molecular behavior.
Explain why a liquid cools down as it evaporates.
Explain why boiling water at high altitude takes longer to cook food than at sea level.
Explain why evaporation is faster at higher temperatures.
Explain why liquids with weaker intermolecular forces evaporate more quickly.
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?
Why does sweating help cool the human body?
