9. (20 Pts) A rigid tank contains 12 lbm of air at 20 psia and 65°F. The air is now heated until its pressure doubles. Determine the amount of heat transfer [BTU] associated with this process. Assume constant specific heats at 80 °F.
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Given: Initial pressure (P1) = 20 psia To convert psia to absolute pressure, we add the atmospheric pressure, which is 14.7 psia. So, P1 = 20 psia + 14.7 psia = 34.7 psia Show more…
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