CHAPTER 8
THERMODYNAMICS: THE SECOND AND THIRD LAWS
8.67
In order to find G r at a temperature other than 298 K, we must first
calculate H r and S r and then use the relationship
G r H r T S r to calculate G r .
(a) In order to determine the range over wh
CHAPTER 7
THERMODYNAMICS: THE FIRST LAW
7.18
(a) The heat change will be made up of two terms: one term to raise the
temperature of the stainless steel and the other to raise the temperature of
the water:
q (400.0 g)(4.18 J (C) 1 g 1 )(100.0C 22.0C)
(500
CHAPTER 3
MOLECULAR SHAPE AND STRUCTURE
3.36
(a) sp 3 d 2 ;
(b) sp 3 ;
3.38
(a) sp;
3.44
(a) In the NH2+ molecule, there is a single lone pair of electrons on the
(b) sp 2 ;
(c) sp 3 ;
(c) sp 2 ;
(d) sp 2
(d) sp 3
central N atom and as a result, the hybri
CHAPTER 8
THERMODYNAMICS: THE SECOND AND THIRD LAWS
8.90
The reactions are
(a) CH3 OH(l) CO(g) CH 3 COOH(l)
(b) C2 H 5 OH(l) O 2 (g) CH 3 COOH(l) H 2 O(l)
(c) CH 4 (g) CO 2 (g) CH 3 COOH(l)
To understand these three reactions completely, we must calculate
CHAPTER 7
THERMODYNAMICS: THE FIRST LAW
H
7.107
H
H
C
H
(1)
H
C
H
C
(a)
C
C
H
C
H
H
C
H
H
C
H
H
C
(2)
C
C
H
C
H
H
H
H
H
H
C
C
C
H
(3)
H
C
C
C
H
H
H
H
H
H
H
H
(b) From bond enthalpies, each step is identical, as the number and types
of bonds broken and for
CHAPTER 4
THE PROPERTIES OF GASES
4.57
The molar mass of glucose is 180.15 g mol1 . From this, we can calculate
the number of moles of glucose formed and, using the reaction
stoichiometry, determine the number of moles of CO 2 needed. With that
informatio
Homework Assignment #12 McQuarrie Questions
14.25
If we let the first two equations be 1 and 2, then the equation
()
()
()
()
can be obtained from the first two equations by:
()
()
()
According to Hess Law, we write:
()
()
14.35
(a) Hrxn =
=
=
2Hf[HF(g)]
Homework Assignment #13 McQuarrie Questions
6.29
Recall that for neutral atoms, the (n+1)s orbitals are of lower energy than the nd orbitals; for
example, 4s < 3d. However, for ions, the reverse is true; that is, 4s > 3d. thus, we first
determine the numb
Homework Assignment #6 McQuarrie Questions
4.19
4.40
We use Equation 4.12 with ni = 3 and nf = 1.
(
)
The frequency of a photon with this energy is obtained from Equation 4.3
This line appears in the Lyman series in the UV region.
4.61
A frequency of 5.45
Homework Assignment #7 McQuarrie Questions
7.5
a) The eight valence electrons are used to form the four C-H bonds.
b) Six of the 14 valence electrons are used to form the C-H bonds, two to form the C-F
bond, and the six remaining valence electrons are pla
Homework Assignment #9 McQuarrie Questions
7.33
Electronegativities increase as you go from left to right across a row in the periodic table and
decrease as you go down a column in the periodic table. Thus we have:
F > O > S > Si > Na
7.35
Electronegativi
Homework Assignment #8 McQuarrie Questions
7.4
a)
b)
c)
d)
7.16
The Lewis formula for the arrangement N-O-O is:
Where we have assigned formal charges according to Equation 7.1. The arrangement
where nitrogen is the central atom has the Lewis formulas:
Whe