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Pershing Chemistry 2

Pershing Chem Chpt 2

What things do we know about atoms? (how big, movement, where are they found, do they bump other atoms?) They are tiny. They are always moving. They are found in everything. They bump into other atoms
How do the particles move in a gas? quickly or fast
What kind of solid has particles in an orderly repeating pattern? Crystalline solid
In what state are the particles packed close together and vibrate in place? in a solid
What is different in maple syrup than in water? its viscosity
What happens to the particles at higher temperatures? the particles moved faster
Why can balloons be twisted into shapes? the particles can be compressed or put in smaller areas
What does Charles's law tell us about the effect of temperature on the volume of a gas? if you decrease the temperature, the volume decreases
Describe the particles in a volleyball that is under high pressure? There are more particles and they are closer together. (if the pressure is decreased, there are less and the particles have more space
What does Boyle's law say? in a gas, the volume of the gas is inversely related to pressure and the temperature does not change.
What is sublimation? a substance going directly from a solid to a gas
What is vapor pressure? pressure inside bubbles of boiling liquid
What is it called when a substance goes from a solid to a liquid? melting
What is "change of state"? the changing from one physical state to another
What is an endothermic change? when energy is gained in a substance as it changes state
What is an exothermic change? when energy is removed as a substance changes state
What is evaporation? changing from liquid to a gas
What is it called when gas changes to a liquid? condensation
What are the characteristics of the boiling state? the changing of liquid to a gas throughout the liquid
What point is the same as the freezing point in water? melting point
Why can someone smell something from across the room in a short period of time? particles evaporate into the air
What is the opposite of evaporation? condensation
What happens when the particles of dry ice gain energy? an exothermic reaction takes place and the dry ice can enter the air
What happens in an exothermic change? the substance looses energy and cools down
What is viscosity? the resistance of a substance to flow
What state has a fixed volume but not a fixed shape? a liquid
Describe the particles in a gas. They are far apart and moving quickly
What is surface tension? It describes the strength of the bonds between the molecules in a liquid.
The opposite of evaporation is... condesation
Created by: ellist



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