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Chemistry Chapter 3

TermDefinition
Temperature A measure of the average thermal energy of atoms and molecules.
Fahrenheit The ___ temperature scale, used in the United States, has a boiling temperature of water at 212.
Kinetic Energy The energy of motion is referred to as ____.
Thermometer A device used to measure temperature is called a/an ____.
Absolute Zero The theoretical temperature where all motion stops is called____.
Celsius The SI dervived unit of temperature is called the ____ scale. When using this unit, water freezes at zero degrees.
Heat Is a measure of the thermal energy of a substance.
System A group of interacting objects and effects that are selected for investigation is called a/an ____.
Joule, Calorie The units of ___ and ____ are used to measure heat energy.
Thermal Equilibrium When the temperature of two systems is the same and heat no longer flows between them, they are in ____.
Conductor A material that easily permits the flow of heat across it is called a/an _____.
Specific Heat The amount of heat needed to raise one gram of substance by one degree is called the ____.
Insulator A material that does not permit the flow of heat across it is called a/an ____.
Liquid In the ___ phase of matter, the atoms or molecules are able to move and change positions, but are still touching each other.
Vaporization The process of _____ requires a great deal of energy, because it breaks the bonds that hold molecules together in their liquid phase and separates them.
Solid In the ____ phase of matter, the atoms or molecules are not able to movie or change positions.
Heat of Fusion The amount of heat required to melt one mole of ice is called the_______.
Evaporation Liquids kept in an uncovered container slowly lose volume over time through the process of ______.
Phase Change A substance undergoes a/an ______ when its molecules are rearranged without cramping the individual molecules.
Melting Point The temperature at which a substance changes from a solid to a liquid is called the _____.
Dew Point The temperature at which the vapor pressure of a liquid is equal to the atmospheric pressure is called the ______.
Gas The ____ phase of matter has no definite volume.
How to calculate specific heat. Cp=E/(mx Delta T)
Label for thermal energy. Joule
Unit for temperature asked. C (celsius)
Define Thermal Equilibrium A condition in which two systems have the same temperature and no net heat flows from one system to the other.
If we added a layer of insulation and a stopper to this test tube, how would it affect the heat flow of the system? Insulation would keep more heat inside the system and raise the temperature of the water.
Pick the most appropriate notes you might take. H20 has high specific heat, takes lots of energy to change the temp. of H20, water helps to maintain constant Earth temp.
If you place a cold bar on top of a warmer bar, what will happen at the molecular level? Block A is warmer than Block B. Heat is transferred from the warm to cooler box, the two blocks are the same temperature and heat flow stops.
What way does heat travel. Warm to cold. Never cold to hot.
Explain why your skin feels cool when you sweat. Sweat droplets take heat energy from your skin when evaporation occurs. Thus reduces the temperature of your body and heat flows outward into the surroundings.
Solid to Liquid melting
Liquid to gas boiling
Gas to liquid condensing/ condensation
Liquid to solid freezing
still lines on a graph potential energy
Rising lines on a graph Kinetic energy
Created by: crc.maria
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