States of Matter
List the three states of matter
Solids, liquids, & gases
How does atmospheric pressure affect the boiling point of a substance?
What is pressure?
A pressure (of a gas) is the force of its outward push over an area.
Mike has a spoonful of jelly. The jelly has a definite shape and volume in the spoon, but only if he does not tip the spoon. What property is being talked about as he is tipping the spoon.
Viscosity
If a liquid acetone changes into a gas after 30 minutes, how many minutes did it take for all the acetone to turn into a gas.
30 minutes
What does Boyle's Law state
As volume increases, so does the temperature (vice versa). Therefore, the relationship between the two are DIRECTLY proportional.
As the plastic bottles were heated, they softened and were formed into new solids. Their particles are what type of solid?
Amorphous solid, in no regular repeating pattern, so they are different from crystalline solids.
What is sublimation and give an example
Sublimation- when a solid changes directly into a gas (it skips the liquid state)
Ex) Clothing is hung to dry outside when the temperature is below freezing, dry ice changes directly into carbon dioxide
Inside the gym, the basketball were firm and bounced well. When the basketball was taken outside and left for awhile, it seemed flat and did not bounce well. What happened?
The temperature outside was colder than in the gym, so the pressure of the air in the ball "leaked" out/decreased.
A hiker is lost and needs to find his way back. He has a cup of water and a needle. He magnetizes the needle and then gently places it on the surface of the water, where it points North. What property is allowing this to happen? (Think about the surface of the water and the needle able to sit on top)
Surface tension- the water molecules are able to pull inward.
If gallium change from a solid to a liquid by melting in your hand, but turn back into a solid in container at room temperature. What can you say about gallium's freezing and melting point?
The freezing and melting point of gallium are the same/equal.
As the water sat on a glove in below freezing temperatures, the thermal energy _______, and the water on the glove started to ______
decrease, freeze
List the three states of matter, and describe how the particles are arranged in each.
Solid- packed, vibrating in place, definite shape/volume
Liquid- packed, moves around each other, definite volume, not definite shape
Gas- spread out, moves quickly, no definite volume/shape
What is the difference between evaporation and boiling?
Evaporation- vaporization that takes place only on the surface of a liquid
Boiling- vaporization that takes place both below and at the surface of the liquid
BONUS QUESTION
Cassie & Emily are ice-fishing. The pond was frozen over. As they sat on the ice, the thermal energy ________, and some of the ice _______.
Increased, melted.