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Chemistry Exam 3
key terms
6
Chemistry
Undergraduate 1
03/26/2012

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Term
enthalpy
Definition
total measure of energy in a system (work and heat)
Term
entropy
Definition
S
thermodynamic function that increases with number of energetically equivalent ways to arrange the components of a system to achieve a particular state
Term
entropy equation
Definition
S = klnW
k = 1.38x10^-23
W = # of energetically equivalent ways to arrange system
Term
processes in which entropy increases
Definition
solid -> liquid
solid -> gas
liquid -> gas
increase in number of moles during a chemical reaction
Term
entropy changes in surroundings
Definition
exothermic process increases entropy of surroundings
endothermic process decreases entropy of surroundings
Term
entropy change in surroundings
Definition
deltaS(surroundings) = -q(sys)/T = -deltaH(sys)/T
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