Chem. 152 – Chapter 16, section 1-6 Reading Objectives – Zumdahl

 

1.       Understand the meanings of the terms spontaneous and non-spontaneous.  Know that the application of these terms to a specific reaction is dependent on the reaction conditions.

 

2.       Know the meaning of the term entropy and understand how it relates to spontaneity.  Understand how positional entropy differs with states of matter.

 

3.       Be familiar with what is stated in the Second Law of Thermodynamics.

 

4.       Understand the difference between the entropy of the system, the entropy of the surroundings, and the entropy of the universe.  Be aware of how these distinctions apply to the Second Law of Thermodynamics.

 

5.       Understand how the sign of DS relates to increases and decrease in entropy.

 

6.       Understand how the direction of heat flow affects the entropy of the system and the surroundings. 

 

7.       Understand how phase changes, temperature changes and volume changes affect changes in entropy.

 

8.       Understand how Gibbs free energy change relates changes in entropy and enthalpy at constant temperature and pressure.  Also, understand how the sign of DG indicates spontaneity.

 

9.       Know what factors affect the spontaneity of any physical or chemical process. Be able to predict spontaneity (relative to temperature) based on the signs of DH and DS.

 

10.   Understand how changes in number of particles affect changes in entropy.

 

11.   Know what is stated in the Third Law of Thermodynamics.  Understand why temperature changes affect absolute entropy.

 

12.   Be able to use Appendix 4 to calculate the standard entropy change of a reaction (DS°rxn).

 

13.   Be aware of the conditions specified by DG° and understand how to calculate DG°rxn (three ways).

 

14.   Understand that even under conditions which make a reaction spontaneous, the reaction may not occur rapidly enough to be useful.