15 Questions
Which state of matter has atoms and molecules that are closer together, allowing for a definite shape and size?
Solid
What happens when a gas loses energy?
It becomes a liquid
Which factor, along with temperature, determines the phase of a substance according to the text?
Pressure
What is the point where a pure substance will be a solid, liquid, and vapor all at the same time known as?
Triple point
Which phase change involves a gas turning straight into a solid, skipping the liquid phase?
Deposition
What occurs when a liquid loses energy or gains pressure and turns into a solid?
Freezing
What is the point called when the boundary between a liquid and a vapor disappears?
Critical point
Which process allows a substance to change directly from a solid to a gas without going through the liquid phase?
Sublimation
In a phase diagram, what does the flat line represent during a phase change?
Coexistence of two phases
What is the main reason behind the formation of dew on the grass on cold mornings?
The water vapor losing energy when it comes in contact with cooler grass
What is a characteristic of sublimation as described in the text?
It involves a liquid transitioning directly into a gas
Which statement accurately describes the relationship between condensation and evaporation?
Condensation involves the transition from gas to liquid, while evaporation involves liquid to gas transition
Why does the temperature remain constant at stages II and IV in the phase change diagram?
Energy is being used to break or form bonds between molecules
Why do substances have specific phase change temperatures?
To show the energy required for breaking or forming bonds
What effect does pressure have on boiling points in different substances?
Pressure decreases boiling points
Test your knowledge on examples of condensation such as dew forming on grass, water droplets on soda cans, and hot water bottles in a cool environment. Understand how water vapor loses energy when exposed to cooler surfaces, leading to the formation of liquid droplets.
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