← back to the Substrate Record
qid 12199 · engineering#
Question: A chamber contains 5 lbm of an ideal gas, initially at a temperature of 100°F. The gas then undergoes a reversible isobaric process during which 500 Btu are added to the gas as heat. Determine the final temperature of the gas, assuming that the following properties of the gas are known. R = 0.0641 Btu/lbm -°R[0.2684 kJ/kg-°K] k = 1.147
- 200°F
- 400°F
- 500°F
- 300°F
Our answer: D. 300°F Source quote machine-checked (exact quote)
A machine check confirms the quoted words appear at the source. A person has not yet reviewed these. EARN MARKS as a Human Reviewer
How it was answered
Multi-step solver (maze), replayed by code
card: maze · card sha256 ead533b75894d946…
Current source
Wikipedia, "Heat capacity ratio"
https://en.wikipedia.org/wiki/Heat_capacity_ratio
“The heat that is added to the gas goes only partly into heating the gas, while the rest is transformed into the mechanical work performed by the piston.”
Source quote machine-checked (exact quote)
retrieved 2026-09-18T01:44:33.927Z
page text sha256 d144e5524d764877… · content sha256 470bd89b0ae0cefb…
addendum maze_qid12199_b4_maze_input_ADDENDUM_source_rs20260918T014433Z · sha256 49d48f7cb9b16b74… · replaces the version below, addendum sha256 d5ca1f8c944cd24e…
Earlier version (superseded)
https://en.wikipedia.org/wiki/Heat_capacity_ratio
Source weak (http_get_200_text_and_question_terms)
retrieved 2026-09-17T23:25:35.031Z
page text sha256 21f0fd8a554eac0b… · content sha256 —
addendum maze_qid12199_b4_maze_input_ADDENDUM_source_bf20260917T232535Z · sha256 d5ca1f8c944cd24e… · replaces the version below, addendum sha256 13fa61a5583c3561…
Earlier version (superseded)
No public source has been found for this card yet (3 places checked internally).
addendum maze_qid12199_b4_maze_input_ADDENDUM_source · sha256 13fa61a5583c3561…
If you have a Citable Source to dispute or challenge this, ADD IT so we can correct the answer by appending, never deleting. —
hello@lianabanyan.com