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question

One pound of a gas in a piston cylinder arrangement undergoes compression from 500psiato 50psia. The initial volume of the gas is 3 cu. ft per lb. The variation of p and v is such that pv^1.4 is a constant. Calculate the change in internal energy if the work performed is equal to the amount of heat transferred to the surroundings.

category

engineering

options

  1. 15.54 ft^3/lbm
  2. 345280 ftlbf/lbm
  3. 260280 ftlbf/lbm
  4. - 760 Btu/lbm
  5. - 150 Btu/lbm
  6. 420 ft^3/lbm
  7. - 500 Btu/lbm
  8. - 335 Btu/lbm
  9. 0 Btu/lbm (no change in internal energy)
  10. 100 Btu/lbm

src

stemez-Thermodynamics

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