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15. Arigid tank contains 20 Ibm of air at 50 psia and 80F. The air is now heated until its pressure doubles. Determine (a)

15. Arigid tank contains 20 Ibm of air at 50 psia and 80F. The air is now heated until its pressure doubles. Determine (a) the vohume ofthe tank (b) the amount of heat transfer

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