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Ch 1 Lecture

What is the Kinitic Molecular Theory Particles of matter are always moving The kinetic energy (speed) of the particles increases as the temperature increases
What is the extensive property depends on the amount of matter present ex. volume
What is intensive property depends on the identity of the object, not the amount
Describe a solid very low KE- Particles vibrate but don't move around fixed shape fixed volume
Describe a liquid Low KE - particles move around but are still close together no fixed shape fixed volume
Describe a Gas High KE- particles move around freely no shape or volume
Describe Plasma Very high KE- particled collided to make charged particles gas-like ex: stars, floursent light blubs
What is the Bose- Einstein Condensate atoms mount on each other
examples of heterogenous mixtures pepper, paint
Homogenous mixtures solution, salt water, tea
what is an element A pure substance, composed of identical atoms ex: copper, aluminum foil
what is a compound a pure substance, composed of 2 or more elements in a fixed ratio, properties differ from those individual elements ex: table salt co2 iconic vs molecular compounds
what is the law of definite composition a given compound always contains the same fixed ratios of elements
what id the law of multiple proportions elements can combine in different ratios to form different compunds
what is a mixture variable combination of 2 or more pure substances can be seprated by physical means distillation,density, fillteration,iling magnent
what is a solution a homomgenous mixture , very small particles,no Tyndale effect , parrticles don't settle ex: rubbing alchol , salt water
what is a collid heterogenous mixture, medium sized particles, Tyndale effect, particles don't settle ex: milk, mannoyaise, fog
hat is the tyndall effect Light is scattered by collid particles suspended in a clear substance ex: gelatin in water = collid salt in water = solution
at is a suspension heterogenous mixture, tyndall effect, rge particles, particles don't settle ex: lemonade , muddy water, Italian dressing
example extensive volume mass
example of intensive boiling point, density, conductivity
what is a physical property can be observed withouth changing the identity of the substance
what is a chemical property describe the ability of a substance to undergo a changes in identity
examples physical melting point, magnetic, density
example chemical flammable, tarnishes in air
what is a physical change changes the form of the substances but without changing its identity and properities
what is a chemical change changes the identity of a substance , and diffrenet properties
signs of a chemical changes change in color, odor, formation of a gas and a solid, change in light and heat
chemical changes / burning a log, rusting iron
physical ? melting ice , grinding spices, dissolving in water
How is the periodic table set up group (families
Created by: BB2424