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Chapter 9 Science

Chapter 9 Studystack of Notes

TermDefinition
Heat from ----- to ----- Hot to cold
Kinetic-molecular model Shows that particles are in constant motion
Potential energy (PE) Energy possessed because of position to other objects
Kinetic energy (KE) Energy possessed because of motion
Total internal energy (TE) Sum of kinetic energy and potential energy
Thermal energy Sum of all kinetic energy in a particle
Loss of thermal energy usually means ----- Falling temperatures
Gain of thermal energy usually means ----- Rising temperatures
Average kinetic energy Temperature
Fiducial points Boiling and freezing point of water
Advantage of Kelvin scale There is no zero or negative values
Thermal expansion When particles gain energy and move away from each other
Electrical resistance Way to measure how well electricity is conducted
Viscosity Measure of the resistance of liquids to flow
Heat Quantity of thermal energy that flows from one place to another
Conduction Occurs when two object of temperatures touch
Thermal equilibrium When two objects are at the same temperature
Convection Thermal energy carried from one location to another by a fluid
Radiation Thermal energy that radiates from the source outward.
Radiant energy can transfer thermal energy between two objects that are not in ----- Contact
Vacuum Large amounts of empty space. The best insulator.
Heat capacity (C) Relationship between the amount of thermal energy absorbed and the temperature change caused by this
Specific heat capacity/specific heat Heat capacity per gram of material
Latent heat of fusion Amount of thermal energy exchanged per gram of material during melting or freezing
Latent heat of vaporization Amount of heat it takes to change the liquid to a gas
Freezing Phase change as a substance changes from a liquid to a solid
Melting Phase change as a substance changes from a solid to a liquid
Condensation Phase change as a substance changes from a gas to a liquid
Vaporization Phase change as a substance changes from a liquid to a gas
Sublimation Phase change as a substance changes from a solid to a gas without passing through the intermediate state of a liquid
Deposition Phase change as a substance changes from a gas to a solid without passing through the intermediate state of a liquid
Triple point Temperature and pressure at which the solid, liquid, and gas phases exist simultaneously
Critical point Temperature above which a substance will always be a gas regardless of the pressure
Freezing point Temperature at which the solid and liquid phases of a substance are in equilibrium at atmospheric pressure
Boiling point Temperature at which the vapor pressure of a liquid is equal to the pressure on the liquid
Created by: haduj2