Thermodynamics HW Solutions 9

Thermodynamics HW Solutions 9 - Chapter 1 Basics of Heat...

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Chapter 1 Basics of Heat Transfer 1-28 The hydrogen gas in a rigid tank is cooled until its temperature drops to 300 K. The final pressure in the tank and the amount of heat transfer are to be determined. Assumptions 1 Hydrogen is an ideal gas since it is at a high temperature and low pressure relative to its critical point values of -240 ° C and 1.30 MPa. 2 The kinetic and potential energy changes are negligible, . ΔΔ ke pe ≅≅ 0 Properties The gas constant of hydrogen is R = 4.124 kPa.m 3 /kg.K (Table A-1). Analysis ( a ) We take the hydrogen in the tank as our system. This is a closed system since no mass enters or leaves. The final pressure of hydrogen can be determined from the ideal gas relation, kPa 178.6 =
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This note was uploaded on 01/14/2012 for the course PHY 4803 taught by Professor Dr.danielarenas during the Fall '10 term at UNF.

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