UNIT 9 FLASHCARDS

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Chemistry

10th

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25 Terms

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activation energy
the amount of energy needed for a reaction to begin
the amount of energy needed for a reaction to begin
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calorimeter
an insulated container used to determine the amount of energy exchanged during a chemical reaction or physical process
an insulated container used to determine the amount of energy exchanged during a chemical reaction or physical process
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condensation
the transition of gaseous particles to liquid particles through a decrease in temperature
the transition of gaseous particles to liquid particles through a decrease in temperature
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deposition
the transition of gaseous particles to solid particles through a decrease in temperature
the transition of gaseous particles to solid particles through a decrease in temperature
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endothermic
a reaction in which energy is absorbed as heat from the surroundings
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energy diagram
graph which shows the changes in enthalpy that occur during the progress of a reaction
graph which shows the changes in enthalpy that occur during the progress of a reaction
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enthalpy
the amount of heat exchanged between reactants and products during a chemical reaction
the amount of heat exchanged between reactants and products during a chemical reaction
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entropy
the measure of dispersal or randomness of particles in a system
the measure of dispersal or randomness of particles in a system
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exothermic
a reaction in which energy is released as heat to the surroundings
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freezing
the transition of liquid particles to solid particles through a decrease in temperature
the transition of liquid particles to solid particles through a decrease in temperature
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heating curve
graphically shows the phase changes that occur with an increase in temperature
graphically shows the phase changes that occur with an increase in temperature
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heat of fusion
the amount of energy required to melt on more of solid
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heat of vaporization
the amount of energy required to boil one more of a liquid
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joule
the SI unit used to measure heat or energy
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law of conservation of energy
states that energy cannot be created nor destroyed
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melting
the transition of solid particles to liquid particles through an increase in temperature
the transition of solid particles to liquid particles through an increase in temperature
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phase diagram
graph that shows the phases of a substance under different conditions of pressure and temperature
graph that shows the phases of a substance under different conditions of pressure and temperature
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specific heat
the amount of heat needed to raise the temperature of one gram of a substance by 1°C
the amount of heat needed to raise the temperature of one gram of a substance by 1°C
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spontaneous
a reaction or process that can occur without outside intervention
a reaction or process that can occur without outside intervention
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sublimation
the transition of solid particles to gaseous particles through an increase in temperature
the transition of solid particles to gaseous particles through an increase in temperature
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system
refers to the reaction or process being observed
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thermochemistry
the study of energy exchanges during reactions or processes
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transition state
an intermediate structure during the course of a reaction which is no longer reactant but not yet product
an intermediate structure during the course of a reaction which is no longer reactant but not yet product
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triple point
the conditions at which all three phases of matter exist at the same time
the conditions at which all three phases of matter exist at the same time
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vaporization
the transition of liquid particles to gaseous particles through an increase in temperature