Problem 202. A cylinder of mass 8 kg and cross-sectional area 20 cm is hanging, suspended on its piston. The cylinder contains helium of temperature 27 °C. The temperature is slowly decreasing. How much heat is necessary to extract from the helium so that the initial length 11.2 dm of the gas column decreases to 8.96 dm? The external air pressure is 10 Pa. a = 10 m/s. The molar specific heat of helium at constant volume is C, =12300 J/(kmol K). %3D
Problem 202. A cylinder of mass 8 kg and cross-sectional area 20 cm is hanging, suspended on its piston. The cylinder contains helium of temperature 27 °C. The temperature is slowly decreasing. How much heat is necessary to extract from the helium so that the initial length 11.2 dm of the gas column decreases to 8.96 dm? The external air pressure is 10 Pa. a = 10 m/s. The molar specific heat of helium at constant volume is C, =12300 J/(kmol K). %3D
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Transcribed Image Text:Problem 202. A cylinder of mass 8 kg and cross-sectional
area 20 cm is hanging, suspended on its piston. The cylinder
contains helium of temperature 27 °C. The temperature is
slowly decreasing. How much heat is necessary to extract from
the helium so that the initial length 11.2 dm of the gas column
decreases to 8.96 dm? The external air pressure is 10° Pa,
q = 10 m/s. The molar specific heat of helium at constant
%3D
g =
volume is C, = 12300 J/(kmol K).
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