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Chemistry Test Rev.
Review for my Chemistry Test
| Question | Answer |
|---|---|
| Define Matter | Something that takes up space |
| What is the difference between intrinsic and extrinsic properties? | Intrinsic = The property will not change depending on how much of an object you have(density/temperature). Extrinsic = will change depending on how much of the object you have (mass, volume). |
| Define density | How much mass there is for the volume of an object. |
| Difference Between: A) Elements and Compounds B) Ionic and Covalent Compounds | A) An element is one pure substance, whereas a compound is a combination of a couple of elements. B)Ionic Bond: Bond between two ions of opposite charge Covalent Bond: Chemical bond created when two atoms share electrons |
| Difference Between: A) Compounds and Mixtures B) Heterogeneous and Homogeneous Mixtures | A) Compounds are combined chemically, whereas mixtures are combined physically B)In Homogeneous Mixtures you can't tell what all of the components are, whereas in a Heterogeneous Mixtures, you can. |
| List 4 ways you can separate solids from liquids. | - Filtration - Evaporation - Centrifugation - Crystallization |
| List 2 ways you can seperate two solids. | - Filtration - Dissolution |
| How do you seperate liquids? | Distillation |
| Describe the differences in the three states of matter. | Solids: Strong bonds, atoms only vibrate a little and don't move around much Liquids: Weaker bonds than solids, have a little bit of space to move around in. Gases: Very weak bonds, they move around freely in their container |
| Differentiate kinetic energy from potential energy. | Kinetic energy is when something is moving, potential energy is when something has the potential to move, but isn't yet. |
| Describe the kinetic molecular theory. | - All matter is made of atoms - Particles move all the time - Heavier particles move slower than lighter ones |
| Describe Melting/Freezing | The temperature has hit the melting/freezing point, and now the bonds of the solid are weakened/strengthened, to form a liquid/solid. |
| Describe Boiling | The liquid has hit its boiling point, and now, like at its melting point, the bonds are weakened further, to create a gas. |
| Describe Condensation | A gas hits a cold surface, which quickly changes the particles into liquid particles. |
| Another word for temperature? | Average Kinetic Energy |
| What happens to particles during sublimation? | In sublimation, particles rapidly spread out. |
| How much is 0 degrees Celcius in Kelvin? | 273 Kelvin |
| How is the volume of a gas affected by the temperature of the gas? | By heating/cooling a gas, the particles gain/lose energy. Therefore they hit more/less frequently against their container causing an increase/decrease in volume. |
| State Charles' Law. | When the temperature of a gas is increased, the volume will increase as well. |
| State Boyle's Law. | When the pressure of a gas is increased, the volume will decrease. |
Created by:
Whitelemur
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