Exam 10: Thermal Physics

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A steel sphere sits on top of an aluminum ring.The steel sphere (α = 1.10 × 10−5/C°)has a diameter of 5,000 0 cm at 0°C.The aluminum ring (α = 2.40 × 10−5/C°)has an inside diameter of 4,992 0 cm at 0°C.Closest to which temperature given will the sphere just fall through the ring?

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A quantity of a monatomic ideal gas expands to twice the volume while maintaining the same pressure.If the internal energy of the gas were U0 before the expansion,what is it after the expansion?

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Evaporation cools the liquid that is left behind because the molecules that leave the liquid during evaporation:

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The thermal expansion of a solid is caused by:

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Two one-liter containers each contain 10 moles of a gas.The temperature is the same in both containers.Container A holds helium (molecular mass = 4 u),and Container B holds oxygen (molecular mass = 16 u).Which container has the higher pressure and by what factor?

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John rapidly pulls a plunger out of a cylinder.As the plunger moves away,the gas molecules bouncing elastically off the plunger are:

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The pressure in a constant-volume gas thermometer extrapolates to zero at what temperature?

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The noble gases,listed by increasing molecular weight,are He,Ne,Ar,Kr,Xe,and Rn.If samples of 1 mole each of these gases are placed in separate containers and heated to 300 K,which gas has the greatest internal energy and the molecules of which gas have the highest rms speed?

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Two moles of nitrogen gas are contained in an enclosed cylinder with a movable piston.If the gas temperature is 333 K,and the pressure is 1.14 × 106 N/m2,what is the volume? (R = 8.31 J/mol⋅K)

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What is the root-mean-square speed of chlorine gas molecules at a temperature of 340 K? (R = 8.31 J/mol⋅K,NA = 6.02 × 1023,and the molecular mass of Cl2 = 71)

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A pipe of length 9 m increases in length by 1.7 cm when its temperature is increased by 99°F.What is its coefficient of linear expansion?

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Between 0° and 4°C,the volume coefficient of expansion for water:

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The coefficient of area expansion is:

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Suppose the ends of a 20-m-long steel beam are rigidly clamped at 0°C to prevent expansion.The rail has a cross-sectional area of 27 cm2.What force does the beam exert when it is heated to 42°C? (αsteel = 1.1 × 10−5/C°,Ysteel = 2.0 × 1011 N/m2).

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A long steel beam has a length of twenty-eight meters on a cold day when the temperature is 0°C.What is the length of the beam on a hot day when T = 39°C? (αsteel = 1.1 × 10−5/C°)

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A brass cube,8 cm on a side,is raised in temperature by 248°C.The coefficient of volume expansion of brass is 57 × 10−6/C°.By what percentage does volume increase?

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What is the internal energy of 45 moles of Neon gas (molecular mass = 20 u)at 24°C? (R = 8.31 J/mol⋅K)

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If it is given that 654 K equals 381°C,then it follows that 893 K equals: ​

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What is the temperature of a system in thermal equilibrium with another system made up of water and steam at one atmosphere of pressure?

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Different units can be used for length: m and cm,and of these two,m is the larger by a factor of 100.Different units can also be used for R: (1)J/mol⋅K, (2)L⋅atm/mol⋅K,and (3)(N/m2)⋅m3/mol⋅K.Which of these units for R is the largest? Hint: When expressing R in each of these units,which expression has the lowest numerical factor? (1L = 10−3 m3,1 atm = 1.01 × 105 Pa)

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