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74 Cards in this Set

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A bimetallic strip, consisting of metal Gon top of metal H on the bottom, is rigidly attached to a wall at the left. The coefficient of linear thermal expansion for metal G is greater than that of H. IF the strip is uniformly heated, it will:


A curve upward


B curve downward


C remain horizontal but get longer


D bend in the middle

B curve downward


When the engine of yourcar heats up, the spark plug gap will


A increase


B decrease


C remain unchanged


D decrease at first and then increase later

A increase

Consider a flat steel plate with a hole through its center as shown in fig 13-2. When the palte's temperature is increased, the hole will


A expand only if it takes up more than half the plate's surface area


B contract if it takes up less than half the plates surface area


C always contract


D always expand

D always expand

The coefficient of linear expansion for aluminum is 1.8 times 10 to the -6 C. What is the coefficient of volume expansion?


A 9.0 times ten to the negative sixth


B 5.8 times ten to the negative 18


C 5.4 times ten to the negative sixth


D 3.6 times ten to the negative sixth

C 5.4 times ten to the negative sixth


The surface water temperature on a large, deep lake is 3 C. A sensitive temperature probe is lowered several meters into the lake. What temperature will the probe record?


A a temperature warmer than 3 C


B a temperature less than 3 C


C a temperature equal to 3 C


D there is not enough information to determine

A a temperature warmer than 3 C

A steel bridge is 1000 m long at -20 C in winter. What is the change in length when the temperature rises to 49 C in the summer?


A .33 m


B .44 m


C .55 m


D .66 m

D .66 m

An aluminum rod 17.4 cm long at 20 C is heated to 100 C. What is the new length? aluminum has a linear expansion coefficient of 25*10^-6 C


A 17.435 cm


B 17.365 cm


C .348 cm


D .0348 cm

A 17.435 cm

By how much will a slab of concrete 18 m long contract when the temperature drops from 24 to -16 C?


A .5 cm


B .72 cm


C 1.2 cm


D 1.5 cm

B .72 cm

A bolt hole in a brass plate has a diameter of 1.2 cm at 20 C. What is the diameter of the hole when the plate is heated to 220 C?


A 1.205


B 1.195


C 1.200


D 1.210

A 1.205

10.00 cm of space is available. How long a piece of brass at 20 C can be put there and still fit at 200 C?


A 19.93


B 19.69


C 19.50


D 19.09

A 19.93


A 5.0 cm diameter steel shaft has .1 mm clearance all around its bushing at 20 C. IF the bushing temperature remains constant, at what temperature will the shaft begin to bind?


A 353 C


B 333 C


C 53 C


D 680 C

A 353 C

400 cm cubed of mercury at 0 C will expand to what volume at 50 c?


A 450 cm 3


B 409.7 cm 3


C 403.6 cm 3


D 401.8 cm 3

C 403.6 cm 3

1 L of water at 20 C will occupy what volume at 80 C?


A 1.6 L


B 1.013 L


C .987 L


D .9987 L

B 1.013 L

By how much does the volume of 1.0 L of gasoline change when the temperature rises from 20 C to 40 C?


A 6.0


B 12


C 29


D 37

C 19

A 500 mL glass beaker of water is filled to the rim at a temperature of 0 C. How much water will overflow if the water is heated to a temperature of 95 C?


A 3.3 mL


B 10 mL


C 33 mL


D 100 mL

B 10 mL


for mercury to expand from 4 to 4.1 cm cubed, what change in temp is necessary?


A 400 C


B 139 C


C 14 C


D 8.2 C

B 139 C

A mercury thermometer has a bulb of volume .100 cm 3 at 10 C. The capillary tube above the bulb has a cross sectional area of .012 mm 2. How much will the mercury rise when the temperature rises by 30 C?


A .45 mm


B 4.5 mm


C 45 mm


D 45 cm

C 45 mm

Which of the following is the smallest unit of energy?


A Calorie


B KCal


C Btu


D Joule

D Joule


The amount of heat necessary to raise the temperature of 1 gram of water by 1 C is referred to as the


A calorie


B kcalorie


C Btu


D Joule

A calorie

The reason ocean temperatures do not vary drastically is that


A water has a relatively high rate of heat conduction


B water is a good radiator


C water has a relatively high specific heat


D water is a poor heat conductor

C water has a relatively high specific heat


IT is a well-known fact that water has a higher specific heat than iron. Consider equal ms water and iron at thermal equilibrium. 30 cal of heat are added to each. which is true?


A they remain in thermal equilibrium


B They are no longer in thermal equilibrium, iron is warmer


C they are no longer in thermal equilibrium; the water is warmer


D it is impossible to say without knowingthe exact mass involved and the exact specific heat capacities

B they are no longer in thermal equilibrium; the iron is waremer

Phase changes occur


A as the temperature decreases


B as the temperature inreases


C as the temperature remains the same


D all of the above

C as the temperature remains the same


The heat required tochange a substance from the solid to the liquid state is referred to as the


A heat of fusion


B heat of vaporization


C heat of melting


D heat of freezing

A heat of fusion

The heat required tochange a substance from the liquid to the vapor state is referred to as the

Heat of vaporization

IF heat is added to a pure substance at a steady rate


A the temperature will begin to rise


B it will eventually melt


C it will eventually boil


D more than one of the above is true


E none of them is true

D more than one of the above is true

When a solid melts


A the temperature of the substance increases


B the tmeperature of the substance decreases


C Heat energy leaves the substance


D heat energy enters the substance

D heat energy enters the substance

When a liquid freezes


A the temperature of the substance increases


B the temperature of the substance decreases


C heat energy leaves the substance


D heat energy enters the substance

C heat energy leaves the substance

When a liquid evaporates


A the temperature of the substance increase


B the temperature of the substance decreases


C heat energy leaves the substance


D heat energy enters the substance

D heat energy enters the substance

When a vapor condenses


A the temperature of the substance increases


B the temperature of teh substance decreases


C heat energy leaves the substance


D heat energy enters the substance

C heat energy leaves the substance

IN a cloud formation, water vapor condenses into water droplets which get bigger andbigger until it rains. this will cause the tmeperature of the air in the clouds to


A increase


B decrease


C stay constant


D freeze

A increase


Turning up the flame under a pan of boiling water causes


A the water to boil away faster


B the temperature of the boiling water to increase


C the water to boil faster and the temperature of the boiling water to increase


D none of the above

A the water to boil away faster

Equal masses of water at 20C and 80 C are mixed. What is the final temperature of the mixture?


A 40 C


B 50 C


C 60 C


D 70 C

B 50 C

A chunk of ice is added to a thermally insulated container of cold water. What happens in the container?


A the ice meltsu ntil thermal equilibrium is established


B the water cools down until thermal equilibrium is established


C some of the water freezes and the chunk of ice gets larger


D none of the above

C some of the water freezes and the chunk of ice gets larger

1700 J of work is how much heat?


A 7,116,000 cal


B 7,116 kcal


C 406 cal


D 406 kcal

C 406 cal

18.5 kcal of heat is equivalent to how much work?


A 3.94 J


B 3940 J


C 69.1 J


D 69100 J

D 69100 J

gasoline yields 4.8 * 10 7 joules per kg when burned. The density of gasoline is approximately the same as that fo water, and 1 gal is 3.8 L. How much energy does your caru se on a trip of 100 mi if you get 25 mi/ gallon?


A 3.7 x 10^8 J


B 4.6 x 10^ 8 J


C 6.2 x 10 ^ 8 J


D 7.3 x 10 ^ 8 J

D 7.3 x 10 ^8 J

How much heat is needed to raise the temperature o 100 g of lead by 15 c?


A 16.5 cal


B 165 cal


C 1500 cal


D 15 kcal

B 165 cal

if 40 kcal of heat is added to 2 kg of water, what is the resulting temperature change?


A 80 C


B 40 C


C 20C


D .05 C

C 20 C

a 4.0 kg aluminum block is originally at 10 C. If 160 kJ of heat is added to the block, what is its final temperature?


A 24 C


B 34 C


C 44 C


D 54 C

D 54 C

150 kcal of heat raises the temperature of 2.0 kg of material by 400 F. What is the materials specific heat capacity?


A 1.35 kcal


B .75 kcal


C .34 kcal


D. 19 kcal

C .34 kcal


A person tries to heat up her bath water by adding 5 L of water at 80 C to 60 L of water at 30 C. What is the final temperature of water?


A 34 C


B 36 C


C 38 C


D 40 C

A 34 C

A machine part consists of .1 kg of iron and .16 kg of copper. How much heat is added to the gear if the tmeperature increases at 35 C?


A 9.1x10^2


B 3.8 x 10^3


C 4.0 x 10^3


D 4.4 x 10^3

B 3.8 x 10^3

50 g of lead is put into 75 g of water at 0C. What is the final temperature of the mixture?


A 2 C


B 6.8 C


C 25 C


D 50 C

B 6.8 C

A .600 kg piece of metal is heated to 100 C and placed in an aluminum can of mass .200 kg which contains .500 kg of water initiall at 17.3 C. The final equilibrium temperature of the mixture is 20.2 C, what is the specific heat of the metal?


A 140 J'kgC


B 270 J/kg C


C 450 J/kg C


D 900 J/kg C

A 140 J/kg C

a .1 kg piece of copper, initially at 95 C, is dropped into .20 kg of water contained in a .28 kg aluminum can. The water and aluminum are initially 15 C. What is the final tmeperature of the system?


A 19.2 C


B 18.3 C


C 17.8 C


D 23.7 C

C 17.8 C

On his honeymoon, James Joule attempted to explroe the relationships between various forms of energy by measuring the rise of temperature of water which had fallen down a waterfall on Mount Blanc. What is the maximum temperaturerise one would expect for a waterfall with a drop of 20 m?


A .047 C


B .053 C


C .064 C


D .071 C

A .047 C

The water flowing over Niagara Falls drops a distance of 50 m. Assuming that all the gravitational energy is converted to thermal energy, by what temperature does the water rise?


A .1 C


B .12 C


C .37 C


D .47 C

B .12 C


In an isothermal process, there is no change in


A pressure


B temperature


C volume


D heat

B temperature


When the first law of thermodynamics, Q=DU+W is applied to an ideal gas that is taken through an isothermal process


A dU=0


B W=0


C Q=0


D none of the above

A dU=0

A gas is expanded to twice its original volume with no change in temperature. This process is


A isothermal


B isochoric


C isobaric


D adiabatic

A isothermal

A monatomic ideal gas is compressed to one half its original volume during an adiabatic process. The final pressure of the gas


A increases to twice its original value


B increases to less than twice its original value


C increases to more than twice its original value


D does not change

C increases to more than twice its original value


Consider two cylinders of gas identical in all respects except that one contains O2 and the other He. Both hold the same volume of gas at STP and are closed by a moveable piston at one end. Both gases are now compressed adiabatically to one third their original volume. Which gas will show the greater temperature increase?


A the O2


B the He


C Neither, both will show the same increase


D it's impossible to tell from the information given

B the He

A gas is allowed to expand at constant pressure as heat is added to it. This process is


A isothermal


B isochoric


C isobaric


D adiabatic

C isobaric

Ten J of heat energy are transferred to a sample of ideal gas at constant pressure. As a result, the internal energy of the gas


A increases by 10 J


B increases by less then 10 J


C increases by more than 10 J


D remains unchanged

B increases by less than 10 J

10 J of heat energy are transferred to a sample of ideal gas at constant volume. As a result, the internal energy of the gas


A increases by 10 J


B increases by less than 10 J


C increases by more than 10 J


D remains unchanged

A increases by 10 J

A carnot cycle consists of


A two adiabats and two isobars


B two isobars and two isotherms


C two isotherms and two isomts


D two adiabats and two isotherms

D two adiabats and two isotherms

The coefficient of performance COP of a refrigerator is defined as the ratio of


A the heat removed from the inside to the heat expelled to the outside.


B the heat expelled to the outside to the heat removed from the insdide


C the heat removed from the inside to the work done to remove the heat


D the heat expelled to the outside to the work done to remove the heat

C The heat removed from the outside to the work done to remove the heat

When water freezes, the entropy of water


A increases


B decreases


C does not change


D could either increase or decrease, it depends on other factors

B decreases

According to the second law of thermodynamics, for any process that may occur within an isolated system, which one of the choices applies?


A entropy remains constant


B entropy increases


C entropy decreases


D both A and B are possible


E both A and C are possible

D both A and B are possible


The second law of thermodynamics leads us to conclude that


A the total energy of the universe is constant


B disorder in the universe is increasing with passage of time


C it is theoretically possible to convert heat to work with 100% efficiency


D the average temp of the universe is increasing with the passage of time

B disorder in the universe is increasing with the passage of time


During an isothermal process, 5 J of heat is removed from an ideal gas. What is the change in internal energy?


A zero


B 2.5 J


C 5.0 J


D 10 J

A zero

The work done on an ideal gas system is an isothermal process is -400 J. What is the change in internal energy?


A zero


B -400 J


C 400 J


D none of the above

A zero


200 J of work is done in compressing a gas adiabatically. What is the change in internal energy of the gas?

200 J

A certain amount of monatomic gas is maintained at constant volume as it is cooled by 50 K. The feat is accomplisehd by removing 400 J of energy from the gas. How much work is done by the gas?


A zero


B 400 J


C -400 J


D none of the above

A zero

A monatomic gas is cooled by 50 K at a constant volume when 831 J of energy is removed from it. How many moles of gas are in the sample?


A 2.5 mol


B 1.5 mol


C 1.33 mol


D none of the above

C 1.33 mol

A system consists of 3.0 kg of water at 80 C. 30 J of work is done by the system by stirring with a paddle wheel, while 66 J of heat is removed. What is the change in internal energy of the system?


A 36


B -36


C 96


D -96

B -36

Coal fired plant generates 600 MW of electric power. The plant uses...What is the overall efficiency of this plant for generating electric power?


A 33 %


B 37 %


C 46 %


D 54 %

A 33%

A coal fired plant generates 600 MW of electric power. The plant uses... what is the carnot efficiency?


A 33 %


B 37 %


C 46 %


D 54 %

C 46 %

A coal fired plant generates 600 MW of electric power. The plant uses... How much thermal energy is exhausted each day?


A 1.1 times 10 to the 14


B 2.2 times 10 to the 14


C 3.3 times 10 to the 14


D 600 MJ

A 1.1 times 10 to the 14

What is the carnot efficiency of an engine which operates between 450 K and 310 K?


A 31%


B 41 %


C 59 %


D 69 %

A 31%

What is the maximum theoretical efficiency possible for an engine operating between 100 C and 400 C


A 25 %


B 45 %


C 55 %


D 75 %

B 45 %

The efficiency of a Carnot engine is 35 %. What is the temperature of the cold reservoir if the temperature of the hot reservoir is 500 K?


A 175 K


B 325 K


C 269 K


D 231 K

B 325 K

A heat engine operating between 40 C and 380 C has an efficiency of 60% of that of a Carnot engine operating between the same temperatures. If the engine absorbs heat at a rate of 60 kW, at what reate does it exhaust heat?


A 36 kW


B 41 kW


C 57 kW


D 60 kW

B 41 kW

A A piece of metal at 80 C is placed in 1.2 L of water at 72 C. The system is thermally isolated and reaches a final temperature of 75 C. Estimate the approximate change in entropy for this process.


A .118 cal/K


B 2.5 cal/K


C 3.5 cal/K


D 4.5 cal/K

A .118 cal/K