An ideal gas in a cylinder is compressed by a piston, heated, and cooled so
that it undergoes the cycle shown at right.
The characteristics of the cycle
P
are given below:
a
d
Amount of gas:
n
= 0.5 mol
Peak pressure
P
a
=
P
d
=
3.0 x 10
5
N
/m
2
b
c
Minimum pressure
P
b
=
P
c
= 2.0 x 10
5
N/m
2
Minimum volume
V
a
=
V
b
= 0.005 m
3
V
Maximum volume
V
c
=
V
d
= 0.010 m
3
28)
What is the temperature of the gas at each of the points
a
,
b
,
c
, and
d
?
Answer: T
a
= 361 K; T
b
=241 K; T
c
= 481 K; T
d
= 722 K
29)
Determine each of the following for the process
a

b
:
a)
the work done by the gas.
Answer: zero
d)
the change in the internal energy of the gas.
Answer:
748 J
e)
the amount of heat that enters the gas.
Answer:
748 J
30)
Determine each of the following for the process
b

c
:
a)
the work done by the gas.
Answer: 1000 J
b)
the change in the internal energy of the gas.
Answer:
1497 J
c)
the amount of heat that enters the gas.
Answer:
2497 J
31)
Determine each of the following for the process
c

d
:
a)
the work done by the gas.
Answer: zero
b)
the change in the internal energy of the gas.
Answer: 1503 J
This is the end of the preview.
Sign up
to
access the rest of the document.
 Spring '10
 Phys123
 Thermodynamics, Energy, Heat

Click to edit the document details