HOMEWORK – 1 (due 2004-9-21)
1,To what temp
volume to 100 cm
2,A sample of hydrogen gas was found to have a pr
What can its pressure be expected to be when the tem
3,Investigate som
a radius of 3.0 m
ambient temperatu
density of air is 1.22 kg/m
4,Calculate the work done wh
volume,(b) an open beaker at 25
5,A sample of m
gas expands isotherm
by 3.3 L,(b) Calculate the work that would be done if the sam
6,With reference to Fig-1,and assum
in this system and its temperatur
and ADB,(c) the work done on the ga
Take Cv,m=1.5 R and
7,When a system
system and the system
work done is 10 J?
done on the system
J,find the heat absorbed in the processes
20
1
0.5
C
B
P/atm
erature must a 1.0 L sample of a perfect gas be cooled from 25 °C in order to reduce its
3
essure of 125 kPa when the temperature w
perature is 11 °C?
e of the technicalities of ballooning using the perfect gas law
and that it is spherical,(a) What amount of H2 is need
re of 25 °C at sea level? (b) What mass can the
3
(c) What would be the payload if He was used instead of H
en 50g of iron reacts with hydrochloric
°C and 1 atmosphere (c) an open beaker at 25
ethane of mass 6.56 g occupies 12.7 L at 310 K,(a) Ca
ally against a constant external pressure of 200 T
e expansion occurred reversibly
ing perfect gas behavior,calculate,(a) the am
e in states B and C,(b) the work done on the gas al
s along the isotherm AB,(d) q and
T
A
= 313 K,
is taken from state A to state B along the path ACB in Fig-2,80
does 30 J of work,(a) How much heat flows into
(b) When the system is returned from state B to A
is 20 J,Does the system absorb or liberate heat,and how m
AD and DB,
P
C
A
10
A
D
Fig-1
V / L
as 23 °C,
,Suppose your balloon has
ed to inflate it to 1.0 atm in an
balloon lift at sea level,where the
2
acid in (a) a closed vessel of fixed
°C and 10 atm?
lculate the work done when the
orr until its volume has increased
,
ount of gas molecules
ong the paths ACB
U for each of the three paths,
J of heat flows into the
the system along path ADB if the
along the curved path,the work
uch? (c) If U
D
– U
A
= +40
B
D
V
Fig-2
1,To what temp
volume to 100 cm
2,A sample of hydrogen gas was found to have a pr
What can its pressure be expected to be when the tem
3,Investigate som
a radius of 3.0 m
ambient temperatu
density of air is 1.22 kg/m
4,Calculate the work done wh
volume,(b) an open beaker at 25
5,A sample of m
gas expands isotherm
by 3.3 L,(b) Calculate the work that would be done if the sam
6,With reference to Fig-1,and assum
in this system and its temperatur
and ADB,(c) the work done on the ga
Take Cv,m=1.5 R and
7,When a system
system and the system
work done is 10 J?
done on the system
J,find the heat absorbed in the processes
20
1
0.5
C
B
P/atm
erature must a 1.0 L sample of a perfect gas be cooled from 25 °C in order to reduce its
3
essure of 125 kPa when the temperature w
perature is 11 °C?
e of the technicalities of ballooning using the perfect gas law
and that it is spherical,(a) What amount of H2 is need
re of 25 °C at sea level? (b) What mass can the
3
(c) What would be the payload if He was used instead of H
en 50g of iron reacts with hydrochloric
°C and 1 atmosphere (c) an open beaker at 25
ethane of mass 6.56 g occupies 12.7 L at 310 K,(a) Ca
ally against a constant external pressure of 200 T
e expansion occurred reversibly
ing perfect gas behavior,calculate,(a) the am
e in states B and C,(b) the work done on the gas al
s along the isotherm AB,(d) q and
T
A
= 313 K,
is taken from state A to state B along the path ACB in Fig-2,80
does 30 J of work,(a) How much heat flows into
(b) When the system is returned from state B to A
is 20 J,Does the system absorb or liberate heat,and how m
AD and DB,
P
C
A
10
A
D
Fig-1
V / L
as 23 °C,
,Suppose your balloon has
ed to inflate it to 1.0 atm in an
balloon lift at sea level,where the
2
acid in (a) a closed vessel of fixed
°C and 10 atm?
lculate the work done when the
orr until its volume has increased
,
ount of gas molecules
ong the paths ACB
U for each of the three paths,
J of heat flows into the
the system along path ADB if the
along the curved path,the work
uch? (c) If U
D
– U
A
= +40
B
D
V
Fig-2
