Chemistry unit 2
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13 Terms
First Law of thermodynamics
energy can neither be created nor destroyed (Law of Conservation of Energy)
Temperature
measurement of random movement of particles. Directly proportional to kinetic energy
Heat
energy transferred between 2 objects (hot to cold)
enthalpy
heat energy (deltaH)
calorimetry
measure of heat flow
heat capacity
heat required to raise temperature
Hess’ Law of summation
a reaction carried out in steps equals the sum of the enthalpy changed for individual steps
2nd law of thermodynamics
universe is constantly increasing in disorder
3rd law of thermodynamics
entropy of a perfect crystal at 0 K is 0
entropy
measure of disorder or randomness (deltaS)
more possible microstates
entropy is
spontaneous
thermodynamically favorable
standard free energy of formation
free energy change that occurs when 1 mole of compounds is formed from elements
Note 
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