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MMLU-Pro / 11509 / An adiabatic system, open to the atmosphere which has a pressureof 14.7psia,…

Problem

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question

An adiabatic system, open to the atmosphere which has a pressureof 14.7psia, consists of 1.0lbmof ice at 32°F and 6lbmof liquid water at 80°F.Assuming a constant specific heatC_p = 1.0 Btu/lbm-°F for water, and the latent heat of - fusionfor ice to be 144 Btu/lbm, determine the final temperatureof the system and the change in entropy for the spontaneousadiabatic process.

category

engineering

options

  1. Final temperature: 60.5°F, Change in entropy: + 0.018 Btu/°R
  2. Final temperature: 48.2°F, Change in entropy: + 0.030 Btu/°R
  3. Final temperature: 46.1°F, Change in entropy: + 0.028 Btu/°R
  4. Final temperature: 55.8°F, Change in entropy: + 0.023 Btu/°R
  5. Final temperature: 70.3°F, Change in entropy: + 0.010 Btu/°R
  6. Final temperature: 52.6°F, Change in entropy: + 0.021 Btu/°R
  7. Final temperature: 58.4°F, Change in entropy: + 0.016 Btu/°R
  8. Final temperature: 62.7°F, Change in entropy: + 0.012 Btu/°R
  9. Final temperature: 32°F, Change in entropy: + 0.025 Btu/°R
  10. Final temperature: 65°F, Change in entropy: + 0.015 Btu/°R

src

stemez-Thermodynamics

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Source and history

Official source

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