Chem I Exam Topic List

• Gas


  a form of matter that does not have a definite volume or shape
• liquid


  A state of matter that has no definite shape but has a definite volume.
• Solid


  A state of matter that has a definite shape and a definite volume
• conduction


  The direct transfer of heat from one substance to another substance that it is touching.
• convection


  The transfer of thermal energy by the circulation or movement of a liquid or gas
• Radiation


  The transfer of energy by electromagnetic waves
• physical properties


  Characteristics that can be observed without changing the identity of the substance
• examples of physical properties

  Color, odor, mass, density, specific heat, malleability, ductility, conductivity, melting point, boiling point, magnetism.
• heat transfer


  the movement of energy from a warmer object to a cooler object
• convection current


  the movement of a fluid, caused by differences in temperature, that transfers heat from one part of the fluid to another
• heat


  The energy transferred between objects that are at different temperatures
• temperature


  A measure of the average energy of motion of the particles of a substance. (avg KE)
• heat


  thermal energy in transfer from one body of matter to another
• volume


  The amount of space an object takes up
• mass


  the amount of matter in an object
• matter


  Anything that has mass and takes up space
• thermal energy


  The total energy of all the particles of an object.
• Phase Changes


  Substances change phases by adding or subtracting energy
• States of Matter

  solid, liquid, gas, plasma
• Phase with the highest energy

  Plasma
• no definite shape or volume

  gas
• plasma


  A gas-like state of matter consisting of charged particles
• Plasma characteristics


  No volumeNo shapeInvisible
• Law of Conservation of Matter


  Matter is not created nor destroyed in any chemical or physical change
• Water Phase Change


  solid>melting>liquid>vaporization>gasat phase change, energy stays the same
• Condensation


  The change of state from a gas to a liquid
• Sublimation


  A change directly from the solid to the gaseous state without becoming liquid
• EVAPORATION


  The change of a substance from a liquid to a gas
• FREEZING


  The change of state from a liquid to a solid
• MELTING


  The change in state from a solid to a liquid
• Deposition


  gas to solid
• Boiling point of water

  100 degrees Celsius and 212 degrees Fahrenheit
• Melting Point of Water.

  0 degrees Celsius or 32 degrees Fahrenheit
• Freezing Point of Water.

  0 degrees Celsius and 32 degrees Fahrenheit
• Dew Point of Water

  100 degrees Celsius and 212 degrees Fahrenheit
• Freezing


  liquid to solid
• Melting


  solid to liquid
• Boiling


  Liquid to gas
• dew point


  The temperature at which condensation begins. When the air is completely full or saturated with water vapor.