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Chem Test One M/E
Matter and Energy Notes
| Question | Answer |
|---|---|
| Macroscopic | large enough to be seen with the naked eye |
| Microscopic | small particles that can be seen onwith with the help of a microscope |
| Particulate | atoms and molecules so small that are not visible even with an ordinary microscope |
| Solids | have definite shape and definite volume |
| Liquids | have no shap but definite volume |
| Gases | have no definite shape or volume |
| Melting Point | solids melt becoming a liquid. Temperature increases |
| Boiling Point | liquid boils becoming a gas (vapor). Temperature increases |
| Condensation Point | gases condense and become a liquid. Temperature decreases |
| Freezing Point | Liquids freeze becoming a solid. Temperature decreases |
| Sublimination Point | Solids vaporize becoming a gas. Temperature increase |
| Phase Changes | the temperature at which the changes occur and the specific characteristic for each substance |
| The Law of conservatrion of mass | that matter can be neither created nor destroyed. The total mass of products after we complete a chemical reaction must equal to the total amount of reactants |
| First Law of Thermodynamics | states that energy can neither be created nor destroyed |
| Law of conservation of energy | states that energy can neither be created nor destroyed however one form of energy can be converted to another. The total amount of energy in any system does not change |
| Energy | capacity to do work or capacity to move matter |
| Two forms of energy | Kinetic and Potential |
| Kinetic Energy | energy in motion. KE=1/2mv(squared) |
| Potential Energy | energy that is stored. capacity to more or cause motion. |
| Two types of energy | Mechanical and Chemical |
| Mechanical energy | is the kinetic energy possesed by moving objects. Light, heat, electrical, nuclear |
| Chemical energy | is stored within chemical substances or processes. Energy is given off when chemical substances react. |
| Calorie | the amount of heat or energy required to raise the temperature of 1g of water 1 degree C |
| Heat | is a form of energy that most frequently accompanies chemical reactions. Measured in Joules or calories |
| Temperature | measured in degrees but not a form of energy |
| Specific Heat | is that amount of heat requried to raise the temperature of 1g of any substance substance by 1 degree C |
| Kinetic Molecular Theory | theory of matter refering to motion of molecules, primarily gases as the temp, pressure or volume change. Constant, random, chaotic motion of molecules |
| Molecule | is an aggregate of either identical or different atoms that are bonded together in a particular order by strong attractive forces |
| Brownian Motion | the spontaneous but erratic movement of particles suspended in liquids or gases. |
Created by:
abigaildunham
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