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AP Chemistry
06. Exam Review 6: Thermodynamics
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Thermodynamics Overview
State Functions
Depend on the change occurred, not the process by which it occurred.
Enthalpy change, entropy change, and free energy change are all state functions.
Standard state conditions
All gases are at 1 atm
All liquids and solids are pure
All solutions are at 1 M
Energy of formation of an element in its normal state is 0
Temperature: 298 K
ΔH
Exothermic reactions: When bonds are formed, energy is released.
Endothermic reactions: When bonds are broken, energy is absorbed.
Bond Energy
ΔH
o
= ΣBond energies of bonds broken - Σ Bond energies of bonds formed
Heat Capacity
C
p
= ΔH/ΔT
Specific Heat
q = mcΔT
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