An oil trucker loads 9785
gallons ofVolume
dieselExpansion
fuel in Las
Vegas. Going through Utah,
the temperature was 21° C
lower than in Vegas. If βFUEL=
9.5 x 10 –6 / ° C , how much
fuel is
delivered in
Utah?
A steel Linear
beamExpansion
is 5 m at a
temperature of 20° C. On
a hot day the temperature
rises to 40° C. If αSTEEL=
-6
12 x 10 / ° C, by how
much does it expand?
A 100 cm3 aluminum cup (r = 10
Volume Expansion
cm) is completely filled w/
glycerin @ 22 °C. How much
glycerin spills out if the temp of
the cup and glycerin is raised to
28 °C? Al = 23 x 10-6/ °C
-4
gl = 5.1 x 10 / °C
A cylinder contains 12 L of
PV=NRT
oxygen at 20° C and 15
ATM. The temperature is
raised to 35° C and the
volume is reduced to 8.5 L.
What is the final pressure
of the gas?
A quantity of gas at 10 °C and
PV=NRT
pressure of 100 kPa, occupies a
volume of 2.5 m3. How many
moles of gas are present? If the
pressure is raised to 300 kPa,
and the temp raised to 30 °C,
how much volume will the gas
occupy?
Oxygen gas having a volume of
Moles! 3
5
1000 cm at 1.01 x 10 Pa, and
temp of 40 °C. How many
moles are there?
KE,
RMS
mixture consists
A gas
of
molecules of type 1, 2, 3
such that m1 > m2 > m3 .
Rank the avg. KE and
the vrms greatest first.
3
m of PV=NRT
a gas initially
If 3
at
STP (1 atm, 0°C) is
placed under a pressure
of 4 atm, the temperature
of the gas rises to 38°C,
what is the final volume?
A ½ liter of water at
30°C is cooled with the
removal of 63 kJ of heat.
What is the final
temperature of the
water?
How many
joules of
Q=mcΔT
heat must be added to 5
kg of water to bring it
to the boiling point?
A 0.25 kg cup at 20°C is filled
with 0.25 kg of boiling coffee.
The cup and the coffee come
to thermal equilibrium at
80°C. If no heat is lost, what
is the specific heat of the
cup’s material?
A 0.4 kg sample of methanol
(cmethanol = 2550 J/kg°C) at 16°C
is mixed with 0.5 kg of water at
85°C. Assume that there is no
heat loss to the surroundings.
What is the final
temperature of the
mixture?
A 0.4 kg iron horseshoe (ciron =
448 J/kg°C) that is initially
500 °C is dropped into a
bucket containing 20 kg of
water at 22°C. What is the
final equilibrium
temperature?
A piece of copper ( mCu=.15 kg) is
heated to 100°C and put into a
calorimeter cup containing 0.2 kg
of water at 20 °C. The final
temperature is measured to be 25
°C . If the aluminum cup has a
mass of 0.045 kg, what is the
specific heat of copper? (cAl=900
J/kg °C)
A piece of metal with mass of
0.15 kg is heated to 400°C and
then placed in a 0.20 kg
aluminum calorimeter cup
containing 0.4 kg water at
10°C. If the final temperature
of the mixture is 30.5°C, what
is the specific heat of the
metal? (cAl=900 J/kg °C)
How much
heat
is
needed
to
Phase change
change the temperature of a
piece of ice, whose mass is
720 g at -10°C to a liquid at
15°C ?
How many joules are required
Change
toPhase
turn 800
grams of ice at -20
°C to steam at 135 °C.
CW=4186 J/kg °C , Cice=2100
J/kg °C , Csteam=2010 J/kg °C,
6
LV=2.26 x 10 J/kg
LF=3.33 x 105 J/kg
A volume of 0.5 L of water at
16ºC is put Phase
into an
aluminum ice
Change
tray of mass 0.250 kg at the same
temperature. How much energy
must be removed from this
system by the refrigerator to turn
the water into ice at - 8 ºC ? (cal =
900 J/kg ºC, cice = 2100 J/kg ºC)
A 175 g lump of molten lead at its
melting point 327ºC is dropped into 55
g of water at 20ºC . If there is no heat
loss to the outside, what is the final
temperature of
the mixture if the
water remains in
the liquid state?
(clead = 128 J/kgºC,
Lf,lead = 2.45 x 104 J/kg)
A wall is made up of equal
areas of wood (k = 0.1 JmC)
and glass (k = 0.84 JmC) .
The glass is 0.50 cm thick and
the wood is 4.0 cm thick. For
the same temperature
difference, which conducts
more heat, and how many times
more?
Calculate the rate of heat flow
Heat Flow
through a glass window 2 m by
1.5 m in area and 3.2 mm thick
if the temperatures at the inner
and outer surfaces are 15C
and 14 C. (kglass = 0.84
J/smC).
400 ml of water at 60C is placed in
closed Styrofoam
that is 1.5 mm
Heatcup
Flow
thick and has a surface area of 850
2
cm . The outside air has a constant
temp of 20C . The thermal
conductivity of Styrofoam is 0.033
J/smC. What is the heat flow
through the cup. How long would it
take for the water to cool from 60 C
to 50 C?