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Gas Laws
Properties of States of Matter
Graphing
Changing States of Matter
Miscellaneous
100
What are the 3 variables in the gas laws?
volume, pressure, temperature
100
What state has a defined volume and an undefined shape?
Liquid
100
The independent variable is put on what axis?
x-axis
100
Melting/Freezing involves what states of matter?
solids and liquids
100
What is the difference between a Chemical Change and a Physical Change?
Chemical Change=new substance is created Physical Change=changes how it looks (form), only
200
In Boyle's Law, which variable stays constant?
Temperature
200
Explain at least 2 ways that gas particles move.
fast, spread out as much as they can (don't like each other)
200
When graphed, it is a straight line and starts at (0,0). Directly or Inversely Proportional?
Directly Proportional
200
Define Sublimation
Going from a solid to a gas, not passing through the liquid stage.
200
Define Energy
The ability to do work.
300
Balloons deflating as you take them into the cold is an example of which gas law?
Charles' Law
300
Give an example of a high viscosity liquid.
Answers will vary (ex: honey, crude oil, etc)
300
What does inversely proportional mean?
When one set of numbers goes up, the other set goes down.
300
Which takes more energy: going from a liquid to a solid or going from a liquid to a gas? How do you know?
Going from a liquid to a gas; our graph of energy vs. temperature
300
How can chemical reactions be controlled?
Control the amount of energy they have
400
Using all 3 variables, describe Gay-Lussac's Law.
Volume stays the same. Pressure and Temperature both go up or down, together.
400
What is the same about how gases and liquids move?
They are both free to move anywhere.
400
Which gas law(s) vary directly?
Charles' Law and Gay-Lussac's Law
400
What is the relationship between boiling, vaporization and evaporation and define each of them?
Boiling and Evaporation are forms of Vaporization Vaporization = going from a liquid to a gas Boiling=happens everywhere in the liquid Evaporation=happens only at the top of the liquid
400
Define the Law of Conservation of Energy
Energy can not be created or destroyed; it can only change form.
500
Using all 3 variables, describe Charles' Law.
Pressure stays the same. Temperature and Volume both go up or down together.
500
Plastic containers are an example of what type of solid?
Amorphus
500
If graphing how far you ran in 60 minutes, what variable goes on which axis?
x-axis, time y-axis, distance
500
Explain condensation as it relates to your bathroom mirror while you're taking a hot shower.
The water (liquid) from the shower heats up and vaporizes. As it moves around the bathroom it may hit the mirror. The mirror is cooler because of the materials it's made of. When the gas condensates on the mirror, it cools down too and the water slowly reverts back to the liquid it was. Condensation is this change from a gas to a liquid.
500
Equation for pressure and its units.
p=force/area units: kPa or just Pa (Pascals)