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Homework #3 – Due Friday, September 17
1. Simple values and numbers – time to learn/memorize these important constants and typical values. These
are considered “fundamentals” and it will be assumed that you know these values on exams, in life, etc.
Those that are not known, you will need to learn where to ﬁnd in the library (or as
abslolute last resort
on the WEB).
•
1 standard atmosphere of pressure in (a) Pascal, (b) bars, and (c) psi:
•
The diﬀerence between psia and psig.
•
Molar volume (in cm
3
/mole) of typical solids (Al and Fe), liquids (H
2
O and ethanol) and gases (say
N
2
at 298 K, 1 atm).
•
Typical coeﬃcients of linear expansion for inorganic solids (Fe), polymers (PET  polyethylenetereph
thalate), liquids (water at 4
o
C), and gases (O
2
) at 298 K, 1 atm.
•
What is the
PRECISE
deﬁnition of the calorie? How many diﬀerent types of calories units can you
ﬁnd?
•
The gas constant
R
in units of J/Kmole, cal/Kmole, latm/Kmole.
2. The ideal gas law is a very simplistic description of matter. A slightly better approximation is the van der
Waals equation
‡
P
+
a
v
2
·
(
v

b
) =
RT
where
a
and
b
are constants (given for common gasses in table 8.1 of your text or in the CRC). For H
2
, the
van der Waals constants are
a
= 0
.
2461
l
2
atm/mole
2
and
b
= 0
.
02668
l
/mole.
One hundred moles of H
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This note was uploaded on 04/27/2008 for the course MSE 303 taught by Professor Thompson during the Fall '04 term at Cornell University (Engineering School).
 Fall '04
 THOMPSON

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