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he enthalpy variation;

he enthalpy variation;

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Please answer the following questions. Thanks in advanced!

Given data:
R=8.32J/KMol

Cp=6.94cal/Kmol

γ=1.4

Exercise 9 In a cylinder 200 mm in diameter is imprisoned a certain mass of nitrogen under a pressure of 30 bars absolute and at a temperature of 17°C. The piston, which was initially 100 mm from the bottom of the cylinder, was suddenly released and its movement stopped after a stroke of 100 mm. We are asked to determine: (1) the final gas temperature; 2° the variation of internal energy; (3) the enthalpy variation; 4° the useful work collected on the rod of the piston, the atmospheric pressure of the moment being 1 bar. The friction and the mass of the piston are neglected. We give: R-8.32 J/K.mol,y-1,4,Cp-6.94 cal/K.mole.
Transcribed Image Text:Exercise 9 In a cylinder 200 mm in diameter is imprisoned a certain mass of nitrogen under a pressure of 30 bars absolute and at a temperature of 17°C. The piston, which was initially 100 mm from the bottom of the cylinder, was suddenly released and its movement stopped after a stroke of 100 mm. We are asked to determine: (1) the final gas temperature; 2° the variation of internal energy; (3) the enthalpy variation; 4° the useful work collected on the rod of the piston, the atmospheric pressure of the moment being 1 bar. The friction and the mass of the piston are neglected. We give: R-8.32 J/K.mol,y-1,4,Cp-6.94 cal/K.mole.
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