This preview shows page 1. Sign up to view the full content.
Corrections and Comments to Assigned Problems
Chapter 6
58. (b) The expression E = (3/2)nRT is the internal energy of n moles
of an ideal monatomic gas, such as helium, at temperature T.
Observe that this
internal energy depends only on T; it is independent of molar mass.
Therefore,
lighter molecules must be moving faster on average than heavier molecules at the
same T.
This equation will be given; it need not be memorized.
(This equation does
not come from thermodynamics; it comes from the kinetic theory of gases, statistical
thermodynamics, or experiment.) (c) The work done by the helium is –w, not w.
(d) Note that q is the heat absorbed by the helium.
Chapter 6
49 and 50:
State symbols for the substances must be given; assume
CaCl
2
(s), NaHCO
3
(s), CCl
4
(
ℓ
), HNO
3
(
ℓ
), HI(g), SiF
4
(g), O
3
(g), Ca
3
(PO
4
)
2
(s).
Chapter 7
70.
The equation E
k
= ½ mν
2
should read E
k
= ½ mv
2
; v is speed.
This is the end of the preview. Sign up
to
access the rest of the document.
This note was uploaded on 04/03/2008 for the course CHEM 159160 taught by Professor Zbaida during the Fall '07 term at Rutgers.
 Fall '07
 Zbaida
 Atom, Mole

Click to edit the document details