Studied by 0 peopleactivation energy
the amount of energy needed for a reaction to begin
calorimeter
an insulated container used to determine the amount of energy exchanged during a chemical reaction or physical process
condensation
the transition of gaseous particles to liquid particles through a decrease in temperature
deposition
the transition of gaseous particles to solid particles through a decrease in temperature
endothermic
a reaction in which energy is absorbed as heat from the surroundings
energy diagram
graph which shows the changes in enthalpy that occur during the progress of a reaction
enthalpy
the amount of heat exchanged between reactants and products during a chemical reaction
entropy
the measure of dispersal or randomness of particles in a system
exothermic
a reaction in which energy is released as heat to the surroundings
freezing
the transition of liquid particles to solid particles through a decrease in temperature
heating curve
graphically shows the phase changes that occur with an increase in temperature
heat of fusion
the amount of energy required to melt on more of solid
heat of vaporization
the amount of energy required to boil one more of a liquid
joule
the SI unit used to measure heat or energy
law of conservation of energy
states that energy cannot be created nor destroyed
melting
the transition of solid particles to liquid particles through an increase in temperature
phase diagram
graph that shows the phases of a substance under different conditions of pressure and temperature
specific heat
the amount of heat needed to raise the temperature of one gram of a substance by 1°C
spontaneous
a reaction or process that can occur without outside intervention
sublimation
the transition of solid particles to gaseous particles through an increase in temperature
system
refers to the reaction or process being observed
thermochemistry
the study of energy exchanges during reactions or processes
transition state
an intermediate structure during the course of a reaction which is no longer reactant but not yet product
triple point
the conditions at which all three phases of matter exist at the same time
vaporization
the transition of liquid particles to gaseous particles through an increase in temperature
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