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MMLU-Pro / 4502 / The vapor pressures of C_2H_5OH and H_2O over solutions of these two at 20°C are…

Problem

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question

The vapor pressures of C_2H_5OH and H_2O over solutions of these two at 20°C are as follows: Weight percent C_2H_5OH P_(C)2(H)5OH,torr P_(H)2O,torr 0 20.0 40.0 60.0 80.0 100 0 12.6 20.7 25.6 31.2 43.6 17.5 15.9 14.7 14.1 11.3 0 Find the activity and the activity coefficient of each component in a solution of 40 percent C_2H_5OH by weight. Take the pure substance as the standard state for each component.

category

chemistry

options

  1. a_(C)2(H)5OH = 0.625, a_(H)2O = 0.375, \gamma_(C)2(H)5OH = 1.25, \gamma_(H)2O = 0.75
  2. a_(C)2(H)5OH = 0.500, a_(H)2O = 0.500, \gamma_(C)2(H)5OH = 1.00, \gamma_(H)2O = 1.00
  3. a_(C)2(H)5OH = 0.410, a_(H)2O = 0.590, \gamma_(C)2(H)5OH = 1.10, \gamma_(H)2O = 1.90
  4. a_(C)2(H)5OH = 0.207, a_(H)2O = 0.793, \gamma_(C)2(H)5OH = 1.06, \gamma_(H)2O = 2.30
  5. a_(C)2(H)5OH = 0.340, a_(H)2O = 0.660, \gamma_(C)2(H)5OH = 0.85, \gamma_(H)2O = 1.65
  6. a_(C)2(H)5OH = 0.475, a_(H)2O = 0.840, \gamma_(C)2(H)5OH = 2.30, \gamma_(H)2O = 1.06
  7. a_(C)2(H)5OH = 0.540, a_(H)2O = 0.460, \gamma_(C)2(H)5OH = 1.35, \gamma_(H)2O = 1.15
  8. a_(C)2(H)5OH = 0.793, a_(H)2O = 0.207, \gamma_(C)2(H)5OH = 2.30, \gamma_(H)2O = 1.06
  9. a_(C)2(H)5OH = 0.840, a_(H)2O = 0.475, \gamma_(C)2(H)5OH = 1.06, \gamma_(H)2O = 2.30
  10. a_(C)2(H)5OH = 0.600, a_(H)2O = 0.700, \gamma_(C)2(H)5OH = 1.20, \gamma_(H)2O = 1.40

src

stemez-PhysicalChemistry

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Source and history

upstream_id / Original problem ID
4502
task_id
d1943b78-ca08-5e42-aa20-fda108547418
task_key
default--test--4502
task_revision_id
1
config / split
default / test

Official source

initial import