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WorksheetsUnit 10 Thermochemistry vocabulary
Total questions: 23
Worksheet time: 17mins
Exothermic
the heat content of a system at constant pressure (heat and/or light.) "Will feel hot."
the heat content of a system at constant pressure ΔH
a chemical reaction which requires or absorbs energy (heat and/or light from its surrounds. "Will feel cold".
the minimum energy required to activate or start a chemical reaction.
Endothermic Reaction
the heat content of a system at constant pressure (heat and/or light.) "Will feel hot."
the temperature and pressure where all three phases coexist.
a chemical reaction that requires or absorbs energy (heat and/or light from its surroundings. "Will feel cold".
is the amount of heat energy required to raise the temperature of one gram of that substance.
Potential Energy
change of state
stored energy
change in bond strength and molecular stability
energy of movement
Calorie
the common unit of heat
change in bond strength and molecular stability
increasing in the temperature
the temperature and pressure where all three phases coexist.
Kinetic Energy
the number of particles (moles) of gas
the common unit of heat
stored energy
energy of movement
Triple point
is the amount of heat energy required to raise the temperature of one gram of that substance.
the average kinetic energy of the moving molecules of a substance. It is measured in ℃
the temperature and pressure where all three phases coexist.
is the measure of internal energy of the moving molecules found in all matter.
Specific Heat Capacity
the average kinetic energy of the moving molecules of a substance. It is measured in ℃
is how a chemist determines if a reaction is spontaneous or nonspontaneous
the amount of heat needed to melt/freeze
is the amount of heat energy required to raise the temperature of one gram of that substance.
Temperature
the heat content of a system at constant pressure (heat and/or light.) "Will feel hot."
the average kinetic energy of the moving molecules of a substance. It is measured in ℃
the amount of disorder in a system
the minimum energy to activate or start a chemical reaction
Heat
the amount of heat needed to melt/freeze
change in bond strength and molecular stability
is the amount of heat energy required to raise the temperature of one gram of that substance.
is the measure of internal energy of the moving molecules found in all matter.
Law of Conservation of Energy
energy of movement
stored energy
the temperature and pressure where all three phases coexist.
the total energy of an isolated system remains constant
Enthalpy (heat content)
change in bond strength and molecular stability
increasing in the temperature
the measure of internal energy of the moving molecules found in all matter
is how a chemist determines if a reaction is spontaneous or nonspontaneous
Entropy (ΔS)
increasing the number of particles (moles) of gas
the total energy of an isolated system remains constant
change in bond strength and molecular stability
the amount of disorder in a system
Way entropy can increase
stored energy
change of state
energy of movement
the heat content of a system
Way entropy can increase
Increasing the temperature
disorder in a system
common unit of heat
constant pressure
Way entropy can increase
the minimum energy to activate or start a chemical reaction
increasing volume for a gas
stored energy
heat energy required to raise the temperature
Way entropy can increase
decreasing the amount of elements
change in stability
change in bond
increasing the number of particles (moles) of gas
Gibbs Free Energy (ΔG)
the amount of disorder in a system
is how a chemist determines if a reaction is spontaneous or nonspontaneous
the amount of heat needed to melt/freeze
the total energy of an isolated system
Heat of Fusion
increasing in the mass
increasing in the temperature
the temperature and pressure where all three phases coexist
the amount of heat needed to melt/freeze
Heat of Vaporization
the amount of heat needed to boil/condense
increasing in the temperature
the amount of heat needed to melt/freeze
the amount of disorder in a system
Critical Point
measure of internal energy of the moving molecules found in all matter
the temperature and pressure where all three phases coexist.
the temperature and pressure where it is not longer a state of matter
change in bond strength and molecular stability
Spontaneous reaction
a positive ΔG
a positive ΔH
a negative ΔG
a negative ΔS
Non-spontaneous reaction
a negative ΔH
a negative ΔS
a positive ΔS
a positive ΔG
Activation energy
is the measure of internal energy of the moving molecules found in all matter
a reaction is spontaneous or nonspontaneous
the total energy of an isolated system remains constant
the minimum energy to activate or start a chemical reaction
