CHEM 152 Final exam study booster
This is little review sheet just to get you going.
Use this as a starting point only.
Working problems is the best way to learn.
Remember each problem tests a set of
concepts, recognizing the ideas behind the problem (not just the correct equation) is the
key to mastering this material.
Good luck!
Chapter 9:
1)
What is our definition of energy?
2)
What is the law of conservation of energy?
3)
What are state functions and path functions?
4)
If heat is absorbed by our system from the surroundings what is the sign of q?
5)
If our system does work what is the sign of w?
6)
What is the change in internal energy?
Write it in terms of q and w, then in terms
of the heat capacity (which one?) and the temperature.
State or path function?
7)
Now how do you calculate work? Reversible work?
8)
Define enthalpy.
State or path function?
What is the change in enthalpy?
Write
it in terms of Cp.
9)
Know how to do problems where PV work occurs.
*Work through example 9.2 and 9.4
(without looking at the answers first)
10) Hess’s law follows directly from enthalpy being a state function.
Explain why
that is.
11) What is the procedure for calculating the enthalpy of a reaction by adding reaction
steps?
12) What is a standard state?
Review page 373.
13) What is the enthalpy of an element in its standard state?
14) How do you calculate the standard enthalpy of reaction from the enthalpies of
formation?
*Work through example 9.8 and 9.9
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 Winter '08
 Chiu
 Thermodynamics, Energy, Entropy, Keq

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