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Question

The density of steam at 27 C and 8.3174×104 pascal is 0.8 kg m3. The compressibility factor would be
  1. 0.75
  2. 1
  3. 0.88
  4. 1.1


Solution

The correct option is A 0.75
The compressibility factor is given as

Z=PVnRT

The density of steam is d=wV

Z=PVnRT=PVwMRT=PMdRT=8.314×104×18×1030.8×8.314×300=18×10300×0.8=34=0.75

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