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Chap 9A
Physical Science SS
| Question | Answer |
|---|---|
| Heat flows from | Hot to cold |
| kinetic-molecular model | are in constant motion |
| PE+KE= | internal energy |
| thermal energy | is the sum of all of KE |
| thermal energy can only be measured as it is | transferred from one system to another |
| when molecules move | they are gaining kinetic energy |
| transferring particle kinetic energy, the motion, | is called heating of cooling |
| the temperature of an object is directly related to | the average kinetic energy |
| fiducial points to the | freezing point & boiling point of pure water |
| the advantage of the Kelvin scale is | there are NO negative values |
| thermal expansion happens | on the particle level |
| electrical resistance increases with | increasing temperature because the electrons move more randomly |
| viscosity is the | measure of the resistance of liquids to flow |
| heat | the quantity of thermal energy that flows from one place to another |
| conduction | when 2 objects of different temperatures touch, thermal energy moves to the cooler one |
| when the objects are the same temperature this is | thermal equilibrium |
| conduction is the chief process by which | thermal energy moves through solids |
| convection is | thermal energy carried from one location to another by fluid |
| radiation is | thermal energy that radiates from the source outwards. |
| thermal energy moves most efficiently through | a vacuum as radiant energy |
| a vacuum is | large amounts of empty space |
| radiant energy can transfer thermal energy | between 2 objects that are NOT in contact |
| Radiant energy does NOT use matter to move between systems | thermal energy needs matter to move |
| insulators are materials that | resist the flow of thermal energy |
| the best insulator is | a VACUUM |
| heat capacity is | the relationship between the amount of thermal energy absorbed & the temperature change caused by this. |
| specific heat capacity/specific heat is | the heat capacity per gram of material |
| latent heat of vaporization is | the amount of heat it takes to chance the liquid to a gas |
| freezing is | the phase change as a substance changes from a liquid to a solid |
| melting is | the phase change as a substance changes from a solid to a liquid |
| condensation is | the phase change as a substance changes from a gas to a liquid |
| vaporization is | the phase change as a substance changes from a liquid to a gas |
| sublimation is | the phase change as a substance changes from a solid to a gas without passing through the intermediate state of a liquid |
| deposition is | the phase change as a substance changes from a gas to a solid without passing through the intermediate state of a liquid |
| triple point | the temperature and pressure at which the solid, liquid, and gas phases exist simultaneously |
| critical point | the temperature above which a substance will always be a gas regardless of the pressure |
| freezing point | the temperature at which the solid and liquid phases of a substance are in equilibrium at atmospheric pressure |
| boiling point | the temperature at which vapor pressure of a liquid is equal to the pressure on the liquid |
Created by:
ben24campbell
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