QUESTION 2 2.1 A thermometer has a mercury filled glass bulb with a volume of 2 x 10-7 m attached to a thin glass capillary tube with an inner diameter of 0.1 mm. If the temperature increases by 100K, calculate how far will the mercury rise in the tube. [HINT: Coefficient of volume expansion of mercury (Bmercury) = 1.82 × 104 K-', neglect the expansion %3D of the glass]

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Chapter21: The Kinetic Theory Of Gases
Section: Chapter Questions
Problem 21.9OQ: Which of the assumptions below is not made in the kinetic theory of gases? (a) The number of...
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QUESTION 2
2.1
A thermometer has a mercury filled glass bulb with a volume of 2 x 10-7 m³ attached to a thin glass
capillary tube with an inner diameter of 0.1 mm. If the temperature increases by 100K, calculate how far
will the mercury rise in the tube.
[HINT: Coefficient of volume expansion of mercury (Bmercury) = 1.82 × 104 K-', neglect the expansion
%3D
of the glass]
2.2
A 50 g silver disk at 300°C is placed in 200 cm' of methyl alcohol at 14°C, then removed quickly. The
silver temperature is found to have dropped to 120°C. Calculate the new temperature of the methyl
alcohol.
[HINT: Specific heat capacities of silver and methyl alcohol are, respectively, 235 J/(kg-K) and 2530
J/(kg-K), and density of methyl alcohol is 792 kg/m³]
2.3
A 0.25 mol of a monatomic ideal gas at 27°C is contained in a cylinder that is fitted with a movable
friction free piston. The temperature of the gas is increased to 127°C while the pressure of 1 atm is
maintained. Calculate:
i.
how much work is done by the gas
in the
process,
ii.
the change in internal energy of the gas,
ii.
heat that was supplied to the gas.
Transcribed Image Text:QUESTION 2 2.1 A thermometer has a mercury filled glass bulb with a volume of 2 x 10-7 m³ attached to a thin glass capillary tube with an inner diameter of 0.1 mm. If the temperature increases by 100K, calculate how far will the mercury rise in the tube. [HINT: Coefficient of volume expansion of mercury (Bmercury) = 1.82 × 104 K-', neglect the expansion %3D of the glass] 2.2 A 50 g silver disk at 300°C is placed in 200 cm' of methyl alcohol at 14°C, then removed quickly. The silver temperature is found to have dropped to 120°C. Calculate the new temperature of the methyl alcohol. [HINT: Specific heat capacities of silver and methyl alcohol are, respectively, 235 J/(kg-K) and 2530 J/(kg-K), and density of methyl alcohol is 792 kg/m³] 2.3 A 0.25 mol of a monatomic ideal gas at 27°C is contained in a cylinder that is fitted with a movable friction free piston. The temperature of the gas is increased to 127°C while the pressure of 1 atm is maintained. Calculate: i. how much work is done by the gas in the process, ii. the change in internal energy of the gas, ii. heat that was supplied to the gas.
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