Set: Chemistry

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All 35 Terms

Term Definition
Kinetic Energy The energy an object has because of its motion
Kenetic Molecular Theory The tiny particles of matter are in constant motion
Gas particles Insignifigant volume, no attractive forces, move rapidly in a constant motion, move in strait paths
Gas Pressure The force exerted by a gas per unit surface area of an object
Vacuum The absense of any pressure due to the alck of gas particles
Atmospheric pressure Pressure that results for the collisions of air molecules with objects. greatest in low elevations
Barometers instruments used to measure atmospheric pressure
Kilopascals SI unit of pressure, standard atmospheric pressure is 101.325
Mm Hg or torr The hieght of a column of mercury supported by the atmospheric pressure, standard atmospheric pressure is 760 mm Hg or 760 torr
Atmosphere (atm) metric unit of pressure. 1 atm= 760 mm Hg= 101.325 kPa
Kenetic Temperature Scale used to reflect the relationship between the average kinetic energy, absolute zero= no molecular motion
Kelvin scale no negative temerpature, kelvin temp of a substance is directly proportional to the average kinetic energy of the particles of the substance
Average kinetic energy particles in a collection at any temp. have a wide range of kinetic energies. used to discuss the kinetic energy of the particles in a collection, higher temp= higher kenetic energy
Condensed states of matter liquids and solids, have intermolecular forces (attractive forces) that occur between the particles of a solid or a liquid decrease the space between the particles, increan in pressure has little effect on the volume
Liquids Particles are free to flow and take the shape of their container
Vaporization The conversion of a liquid to a gas or vapor
Condensation The reverse of vaporization. gas --> liquid
Evaporation liquid --> gas when it is NOT boiling, takes place more quickly at higher temps, increased kinetic energ, allows the particles to overcome intermolecular forces to escape as a gas or vapor. high energy particles leave and low energy stay behind
Vapor Pressure Gas molecules escape from a liquid in a sealed container, collide with the walls of the container & produce vapor pressure, gas molecules will niold up pressire and will start condensing back into a liquid, equililbrium forms same # of molecules vaporizing & conodensing so vapor pressure remains the same
Boiling Point The temperature at which the vapor pressure of the liquid is just equal to the external pressure
Normal Boiling Point The boiling point of a sunstance at standard pressure
Melting Point The temperature at which vibrations of the solid molecules become strong enough to break the attractions holding them rigidly in place and allow a liquid to form
Freezing Opposite of melting, liquid --> solid
Phase diagram Gives the vonditions of temperature and pressure at whivh a substance exists as solid, liquid, & gas
Triple Point Describes the only set of conditions when all the pases can exist in equilibrium
Sublimation The change of a substance from a solid in a vapor without passing through a liquid phase
Deposition The change of a substance from a vapor to a solid without passing through a liquid phase
Endothermic Heat is being added or coming in, melting
Exothermic Heat is leaving, freezing
Freezing point same as boiling point
Latent Heat fusion amount of heat needed to melt a substance, loosens intermolecular forces, not change the temperature
H=mHf H= heat energy in joules, m= mass in grams, Hf= latent heat of fusion in J/g
Latent Heat of Vaporization amount of heat neded to boil a substance, used to break intermolecular forces, not change the temperature, more energy is needed to break intermolecular forces than to loosen them, need more energy to boil than to melt
H=mHv H= heat energy in joules, m= mass in grams, Hv= Heat of Vaporization
H=mc/\T Specific Heat formula, m= mass in grams, c= specific heat in J/gC, /\T= change in temperature in C

Set Information

Terms 35
Creator jillyshorr
Created February 1, 2008
Groups None
Tags states, heat, condensed, and
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Unit 11

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jillyshorr : Changed Phase diagrams → Gives the vonditions of temperature and pressure at whivh a substance exists as solid, liquid, & gas to Phase diagram → Gives the vonditions of temperature and pressure at whivh a substance exists as solid, liquid, & gas
jillyshorr : Changed Evaporization → liquid --> gas when it is NOT boiling, takes place more quickly at higher temps, increased kinetic energ, allows the particles to overcome intermolecular forces to escape as a gas or vapor. high energy particles leave and low energy stay behind to Evaporation → liquid --> gas when it is NOT boiling, takes place more quickly at higher temps, increased kinetic energ, allows the particles to overcome intermolecular forces to escape as a gas or vapor. high energy particles leave and low energy stay behind
jillyshorr : Changed Latent Heat of Vaporazation Hv → amount of heat neded to boil a substance, used to break intermolecular forces, not change the temperature, more energy is needed to break intermolecular forces than to loosen them, need more energy to boil than to melt to Latent Heat of Vaporazation → amount of heat neded to boil a substance, used to break intermolecular forces, not change the temperature, more energy is needed to break intermolecular forces than to loosen them, need more energy to boil than to melt
jillyshorr : Changed Latent Heat of Vaporazation → amount of heat neded to boil a substance, used to break intermolecular forces, not change the temperature, more energy is needed to break intermolecular forces than to loosen them, need more energy to boil than to melt to Latent Heat of Vaporization → amount of heat neded to boil a substance, used to break intermolecular forces, not change the temperature, more energy is needed to break intermolecular forces than to loosen them, need more energy to boil than to melt
jillyshorr : Changed Latent Heat fusion Hf → amount of heat needed to melt a substance, loosens intermolecular forces, not change the temperature to Latent Heat fusion → amount of heat needed to melt a substance, loosens intermolecular forces, not change the temperature
jillyshorr : Changed Exothermic → Heat is leabing, freezing to Exothermic → Heat is leavg, freezing
jillyshorr : Changed Exothermic → Heat is leavg, freezing to Exothermic → Heat is leaving, freezing
jillyshorr : Changed Kenetic Temerpature Scale → used to reflect the relationship between the average kinetic energy, absolute zero= no molecular motion to Kenetic Temperature Scale → used to reflect the relationship between the average kinetic energy, absolute zero= no molecular motion
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  1. jillyshorr - 61 scores

Most Missed Words

  1. Kenetic Temperature Scale → used to reflect the relationship between the average kinetic energy, absolute zero= no molecular motion - 7 misses
  2. Average kinetic energy → particles in a collection at any temp. have a wide range of kinetic energies. used to discuss the kinetic energy of the particles in a collection, higher temp= higher kenetic energy - 3 misses
  3. Kenetic Molecular Theory → The tiny particles of matter are in constant motion - 2 misses
  4. Atmosphere (atm) → metric unit of pressure. 1 atm= 760 mm Hg= 101.325 kPa - 2 misses
  5. Barometers → instruments used to measure atmospheric pressure - 1 miss
  6. Kilopascals → SI unit of pressure, standard atmospheric pressure is 101.325 - 1 miss
  7. Evaporation → liquid --> gas when it is NOT boiling, takes place more quickly at higher temps, increased kinetic energ, allows the particles to overcome intermolecular forces to escape as a gas or vapor. high energy particles leave and low energy stay behind - 1 miss