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Chem Test One M/E

Matter and Energy Notes

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