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Chapter 7 part 1
Chemical Reactions: Energy, Rates, and Equilibrium
definition | term |
---|---|
a measure of the transfer of thermal energy | Heat |
The amount of energy that must be supplied to break a bond and separate the atoms in an isolated gaseous molecule. | Bond dissociation energy |
a process or reaction that absorbs heat | Endothermic |
a process or reaction that releases heat | Exothermic |
the difference between the energy of bonds broken in reactants and the energy of bonds formed in products. | Heat of reaction or enthalpy change |
a measure of the amount of energy associated with substances involved in a reaction. | Enthalpy |
a process or reaction that, once started, proceeds on its own without any external influence. | Spontaneous process |
a measure of the amount of molecular disorder in a system | Entropy |
a measure of the increase in disorder or decrease in disorder as a chemical reaction or physical change occurs. | Entropy Change |
a measure of the change in free energy as a chemical reaction or physical change occurs. | Free energy change |
a spontaneous reaction or process that releases free energy and has a negative delta G. | Exergeonic |
a non-spontaneous reaction or process that absorbs free energy and has a positive delta G. | Endergonic |