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MMLU-Pro / 3959 / At 80°C an unknown solute dissolves in benzene to form a solution containing…

Problem

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question

At 80°C an unknown solute dissolves in benzene to form a solution containing 1.25 wt.% of the solute. The vapor pressure of the solution is 752.4 mm Hg and its boiling point is 80.25°C compared to the normal boiling point of benzene which is 80.00°C. Determine a) the molecular weight of the solute assuming it is non volatile, b) the heat of vaporization (per gram) for benzene whose molecular weight is 78.

category

chemistry

options

  1. Molecular weight of solute is approximately 120, heat of vaporization is 135 cal/g
  2. Molecular weight of solite is approximately 105, heat of vaporization is 125 cal/g
  3. Molecular weight of solute is approximately 110, heat of vaporization is 160 cal/g
  4. Molecular weight of solute is approximately 90, heat of vaporization is 120 cal/g
  5. Molecular weight of solute is approximately 85, heat of vaporization is 130 cal/g
  6. Molecular weight of solute is approximately 92, heat of vaporization is 142 cal/g
  7. Molecular weight of solute is approximately 110, heat of vaporization is 140 cal/g
  8. Molecular weight of solute is approximately 100, heat of vaporization is 150 cal/g
  9. Molecular weight of solute is approximately 96.9, heat of vaporization is 128 cal/g
  10. Molecular weight of solute is approximately 98, heat of vaporization is 115 cal/g

src

stemez-PhysicalChemistry

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Source and history

upstream_id / Original problem ID
3959
task_id
7341de5b-c524-53b2-8375-1546f98e858e
task_key
default--test--3959
task_revision_id
1
config / split
default / test

Official source

initial import