CHE 3190
Survey of Physical Chemistry (Fall 2014)
G.Lind
Preliminary Study Guide for Exam 2 (Things you should know)
The exam covers Chapters 6, 7, 10 from House , Fundamentals of Quantum Chemistry , 2nd. ed.
and Chapters 1, 2, 3, 4 from Fenn , Engines, Energy and Entropy
House CH 6 : Vibrations and the Harmonic Oscillator
Study the Lecture Notes
As discussed in class
House CH 7 : Molecular Rotation and Spectroscopy
Sudy the Lecture Notes
As discussed in class
q = mc(Tf – Ti) = C D T
c = specific heat
C = cm = (specific) heat capacity
C
= molar heat capacity (units : Jmol-1 ) ;
n
m
;
n = amount of substance (mol) ;
n=
M
C = n C = m C ; C = MC
C=
C=
C
= specific heat capacity (units : Jg-1)
m
m = mass (g)
;
M = molar mass (gmol -1)
1.0000 cal = 4.1845 J
C increases with the complexity of the molecule :
Equipartition Theorem :
1
1
1
Cu = Rftrans + Rfrot + 2 Rfvib = molar heat capacity at constant volume at high T
2
2
2
1
1
Cu = Rftrans + Rfrot = molar heat capacity at constant volume at low T
2
2
Total degrees of freedom (f) = 3N
with N = number of atoms in molecule
linear molecule : fvib = 3N - 5
;
nonlinear molecule : fvib = 3N - 6
C p = Cu + R
House CH 10 : Symmetry
10.1 What Symmetry Means
Read
10.2 Symmetry Elements
Find all symmetry elements of a given molecule (ion)
You need to be able to draw a correct Lewis structure including all bonding pairs and all lone pairs
You need to be able to determine the molecular geometry (shape) of the molecule (ion)
10.1 What Point Group Is It ?
Using the flow chart provided you need to be able to determine the point group of a molecule (ion)
List your answers (no, yes, ........)
Fenn CH 1 : In the Beginning
Definition of Force,
F = ma , F = mg
(earth)
, units
Definition of Work,
w = FL , units
Calculate force, work given values of mass, distance, g etc (move a mass from a to be etc)
Sign convention ( + is in, - is out)
w = won , q = qadd
Fenn CH 2 : How Hot is Hot
Thermometer, Temperature scales (oC, K, oF)
Zeroth Law
Constant volume Gas Thermometer
Ttp = 273.16 K
Fenn CH 3 : Systems, Properties, and States
Ideal Gas Law : PV = nRT , P V = RT, P =
dRT
mRT P1V1 P2V2
, M=
,
=
T1
T2
M
PV
What is an Ideal Gas
PV graph, PVT graph
Isotherm, Isobar, Isochore
Van der Waals Equation with V and with
PV graph, PVT graph
Isotherm, Isobar, Isochore
V
( a , b)
Fenn CH 4 : Back to Work
Study the lecture notes
Calculate work for different paths, including geometrically (area under curve)
Work going different ways on path (forward, backward)
CHEAT SHEET:
One page (8.5x11 in), both sides, everything handwritten (no copies), no answers to end of chapter
problems or PEs or DQs. Your name must be on the sheet. The sheet has to be handed in with the exam.