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 8
A beaker contains 100 mL of water at 25°C. If the temperature is increased to 50°C, what will happen to the rate of evaporation?
A liquid is heated and starts to form bubbles throughout. What process is occurring?
A puddle of water dries up faster on a hot, windy day than on a cool, humid day. Explain why.
A student leaves a bowl of water in a room. After a few days, the water level drops. What process is responsible for this?
A beaker contains 100 mL of water at 25°C. If the temperature is increased to 50°C, what will happen to the rate of evaporation?
A liquid is heated and starts to form bubbles throughout. What process is occurring?
A puddle of water dries up faster on a hot, windy day than on a cool, humid day. Explain why.
A student leaves a bowl of water in a room. After a few days, the water level drops. What process is responsible for this?
Which of the following best describes boiling? (1) A liquid turning into a gas only at the surface (2) A liquid turning into a gas throughout the liquid at a specific temperature (3) A solid turning into a gas (4) A gas turning into a liquid
Which of the following factors does NOT affect the rate of evaporation? (1) Surface area (2) Temperature (3) Humidity (4) Color of the liquid
Which of the following is a similarity between evaporation and boiling? (1) Both occur only at the surface (2) Both require heat energy (3) Both occur at a fixed temperature (4) Both are chemical changes
Which of the following is NOT a condition for boiling to occur? (1) The liquid must reach its boiling point (2) The vapor pressure must equal atmospheric pressure (3) The liquid must be exposed to air (4) Heat must be supplied
Boiling occurs when the vapor pressure of the liquid is __________ to the atmospheric pressure.
Fill in the blank: The boiling point of a liquid depends on the __________ pressure.
Fill in the blank: The process of a liquid changing to a gas at its boiling point is called __________.
Fill in the blank: The process of a liquid changing to a gas at the surface, below its boiling point, is called __________.
Does boiling occur only at the surface of a liquid?
True or False: All liquids have the same boiling point.
True or False: Boiling and evaporation are both physical changes.
True or False: Boiling point of water decreases at higher altitudes.
