Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/44

Click to flip

44 Cards in this Set

  • Front
  • Back
Matter
Anything that has mass and occupies space
Mass
quantity of matter in an object
Weight
force produced by gravity acting on a mass
3 States of Matter
Solid, Liquid, Gas
3 States of Matter depend on...
the strength of intermolecular forces
Laws of Conversation of Matter
matter cannot be created nor detroyed, it simply changes form
Physical Properties
characteristics of matter that can be measured without changing its chemical nature
Ex. size, color, odor
Physical Change
a change that affects only the physical properties
Ex. boiling, freezing
Chemical Properties
characteristics of matter that can only be observed when substances interact with one another
Chemical Change
a change that produces one or more new substances
Evidence of a Chemical Change (5)
1. evolution of a gas. (bubbles are seen)
2. formation of a precipitate
3. evolution or absorption of heat
4. emission of light
5. a color change as the reaction occurs
Atoms
basic unit of matter
Elements
the simplest substance from which more complex substances are made///
substance that cannot be broken down into other substances by chemical methods
(periodic table)
Molocules
a neutral group of atoms held together by covalent bonds (charge=0)
Compound
substance made up of two or more elements chemically combined
Allotrope
one of a number of different molecular or crystalline forms of an element
Ex. forms of carbon (graphite, diamond)
Ex. oxygen and ozone
Mixture
collection of 2 or more pure substances PHYSICALLY mixed together
Ex. sand and water

(can be separated by non -chemical methods, like evaporation and sifting)
Pure Substances
all molocules are identical
Homogeneous Mixture
mixture containing substances that are uniformly distributed
Ex. SOLUTIONS, alloys
Heterogeneous Mixture
mixture containing substances that are not uniformly distributed
Ex. granite
2 Ways to Separate Mixtures
1. Distillation
2. Filteration
Distillation
separation of substances in a mixture based on their different boiling and cooling points
Ex. water and alcohol
Filteration
separation of substances in a mixture based on the size of the particles
Density
the amount of matter present in a given volume of a substance
Density Formula
mass/ volume
Ex. g/ mL or g/ cm3
Specific Gravity
the ratio of the density of a given liquid to the density of water
Energy
the capacity to do work
Law of Conservation of Energy
energy cannot be created or detroyed. it simply changes form
2 Types Energy
kinetic energy + potential energy
Kinetic Energy
energy a moving object has becuase of its motion
Potential Energy
energy an object has because of its position (stored energy)
Heat
flow of energy due to a temperature difference
Temperature
measure of the average kinetic energy of the particles in a substance
SI Unit for temperature
Kelvin
Absolute Zero
the lowest temperature in the Kevlin scale (absence of motion)
Exothermic
heat is released during a reaction (warm)
Endothermic
absorption of energy in a reaction (cold)
Calorie
the amount of energy needed to raise one gram of water one degree Celcius
SI Unit for Energy
joule
1 cal= ___ Joule
4.184 Joule
Specific Heat
the amount of energy required to raise one gram of substance one degree Kelvin
Calculating Specific Heat
Q= s*m*T
energy required= specific heat capacity*mass* change in temperature
J=(J/g C) (g) (change temp C)
Kevlin to Celcius
C= K-273
Celcius to Kelvin
K= C+273