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MMLU-Pro / 12053 / A piston-cylinder device has an initial contained volume of 0.1 ft^3 and…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

question

A piston-cylinder device has an initial contained volume of 0.1 ft^3 and contains steam at an initial state of 160 psia, 500°F. The steam is then expanded to 20 psia, and as a result of this process 0.50 Btu of heat is transferred to the system. Assuming atmospheric conditions to be 14.7 psia, 80°F calculate (a) the actual useful work done by the system, and (b) the change in availability during the process.

category

engineering

options

  1. -1.00 Btu, 3.00 Btu
  2. -2.00 Btu, 1.50 Btu
  3. 0.50 Btu, -3.00 Btu
  4. -1.50 Btu, -1.00 Btu
  5. - 1.82 Btu, - 2.34 Btu
  6. - 0.82 Btu, - 2.34 Btu
  7. - 0.82 Btu, 2.34 Btu
  8. 0.82 Btu, 2.34 Btu
  9. 1.82 Btu, -0.50 Btu
  10. 1.00 Btu, 0.50 Btu

src

stemez-Thermodynamics

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Source and history

upstream_id / Original problem ID
12053
task_id
bbbc560b-da09-55ef-b597-94a98f378cf5
task_key
default--test--12053
task_revision_id
1
config / split
default / test

Official source

initial import