Entropy

(Lecture id-1126)

TOPICS & OBJECTIVES

1010 - Efficiency & Spontaneity
    1010 - Recognize energy is neither created nor destroyed (its conversved). FIRST LAW
    1020 - Know some energy liberated from a chemical reaction will be lost to surroundings (as heat).
    1030 - Know any energy transfer has some inefficiency (heat loss).
    1040 - Define spontaneity and identify processes that are either spontaneous or non-spontaneous.
    1050 - Recognize spontaneity is controlled by thermodynamics while speed is a result of kinetics.
 
1020 - Distributing Energy
    1010 - Recognize exothermic processes are often, but not always, spontaneous.
    1020 - Define entropy. Know Boltzmanns equation ( S = kb ln w ) and constank (kb = R/Na = 1.38 x10^-23 J/K).
    1030 - Understand the difference between macrostates and microstates.
    1040 - Recognize states with more equivalent microstates are entropically favored.
    1050 - Predict and explain the sign of ΔS of a phase change or other common processes.
 
1030 - Heat Transfer
    1010 - Understand a loss of heat from a system is a gain in entropy for its surroundings.
    1020 - Know entropy of an isolated system never decreases. SECOND LAW
    1030 - Because the univserse is an isolated system, its entropy can only increase.
    1040 - Know a net increase in the entropy of the universe is the driving force for spontaneity.
    1050 - Know temperature (T) relates a systems enthalpy change (q) to the entropy change (ΔS) of its surroundings.
    1060 - Explain why temperature relates q_sys to ΔSsurr.
 


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