Comments re Chapter 1 Problems
|
1-1 |
Definitions. Levine's true/false problems encourage very careful thinking. Note that an intensive variable (like P or T) does not depend on the amount of the substance while an extensive variable (like V or n) does. |
|
1-10 |
Still more definitions. The
reasoning necessary for part a, which is true, is very subtle. See pg. 14.
To be really correct Levine should have specified the normal
boiling point. Note that at the normal
boiling point the pressure is 1 atm (for historical reasons) rather than 1
bar. |
|
1-11 |
A basic exercise in doing conversions. It is useful to remember that there are 760 torr (or, mm Hg) in an atmosphere and 750 torr in a bar. |
|
1-13 |
More about pressure. How does the density of the fluid in a manometer or barometer affect the height of the column? Does the cross-sectional area of the column have any effect? (See pg. 11 of the textbook). |
|
1-22 |
An exercise in symbolic manipulation and in spotting a common error. |
|
1-28 |
How good is a good vacuum? This problem can be solved by using the perfect gas law. |
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|
1-42 |
An exercise in taking total differentials. (Please note that the answer in the Solutions Manual appears to be the answer to a different problem). |
|
1-43 |
More practice with partial derivatives. |
|
1-21 |
Mole relationships in an equilibium reaction. |
|
1-50 |
More practice with partial derivatives. Note that this problem is not short. It is important to avoid making mistakes while doing it. |
|
1-51 |
Calculation of a , k , and their ratio from simple density measurements. Note the sizes of the calculated terms. Note also that the answers are given to two significant digits at most even though the densities have six significant digits. The values of D V are given by the difference between the inverses of the densities. These inverses differ in only the 5th and 6th digits. |
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