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Chapter 9

Physical science chapter 9

TermDefinition
TE Total energy
KE kinetic engery
PE potential energy
Thermal energy is the ___ of all kinetic energies of its particles SUM
Thermal energy is only ____ of the internal energy PART
Gaining thermal energy heating ( when molecules start moving more)
Loosing thermal energy cooling
Heating or cooling Transferring particle kinetic energy (the motion)
Temperature is the _______ of an object's kinetic energy AVERAGE
Measured in degrees Temperature
Advantage of using Kelvins (K) There is NO negative values ( you can not divide by zero or come out with a negative number as your answer)
Fahrenheit to Celsius 5/9 ( Fahrenheit-32)
Celsius to Fahrenheit 9/5 Celsius+32
Thermal expasions When particles gain thermal energy and can move away from each other causing object to gain volume. ( why sidewalks have lines in them)
Electrical resistance Increases with increasing temperature because electrons move move more randomly.
Viscosity Measure of the resistance of liquids to flow
Heat The quantity of thermal energy that flows from one place to another
Conduction when two objects of different temperatures touch and thermal energy from the hotter one moves into the colder one.
Convection thermal energy carried from one location to another by a fluid( gas OR liquid)
Radiation Thermal energy that radiates from the scource outwards ( think of the sun's rays)
The ______ the temperature of the substance, the ______ electromagnet is emitted HIGHER, MORE
Insulators materials that resist the flow of thermal energy (Styrofoam, glass, air, cooler)
Vacuum of space Best type of insulator because no particles present
Heat capacity (C) the relationship between the amount of thermal energy and the temperature change caused by this
Heat capacity is measured in______ Joules(J)/ Degree Celsius OR J/Kelvins (K)
Objects that heat up quickly, ______ down quickly cool
Q=(M)(C)(change in T) Formula for finding thermal energy (in Joules (J))
Latent Heat of fusion the amount of thermal energy exchanged per gram of material during melting OR freezing
Q=mL(f) formula for Latent heat of fusion
Latent heat of vaporization The amount of heat it takes to change a liquid into a gas
Triple point The temperature and pressure at which the solid, liquid, and gas phases exist at the same time
Critical point The temperature above which a substance will always be gas regardless of the pressure
Deposition Phase change as a substance changes from a GAS to a SOLID without passing through the intermediate state of liquid
Sublimation Phase change as a substance changes from a SOLID to a GAS without passing through the intermediate state of liquid
Created by: kreul-grace