{"id":"study-charles-law-balloon-math","audience":"college","category":"explaining","technique":"examples","track":"study","title":"See Charles's law worked out with the balloon demo numbers","free":false,"task":"Your General Chemistry lab used a balloon in hot and cold water to show Charles's law. Get exactly 3 numbered lines: both temperatures converted to Kelvin with the math shown, the new volume calculated with the numbers shown, and one sentence on why the balloon grew, plain text, under 80 words. Use the corrected starting temperature from the TA.","materialLabel":"Your lab notes (attached to your prompt automatically)","material":"CHEM 1110 - General Chemistry Lab 6 - Gas laws (TA: Leila)\n\nCHARLES'S LAW: at constant pressure, volume and temperature (in KELVIN) are directly proportional.\nV1 / T1 = V2 / T2\nConvert: K = °C + 273\n\nBALLOON DEMO:\n- Balloon starts at 2.0 L in room-temperature water at 27°C.\n   ** Leila (TA): \"Correction, the starting water was 27°C, not 17°C like the board said.\" ** (my notes had 17°C)\n- Moved to hot water at 87°C.\n- Question: what's the new volume?\n\nLeila's tips:\n- \"ALWAYS convert to Kelvin first. If you use Celsius, you'll get nonsense.\"\n- \"Show the conversion and the setup on the lab report.\"\n\nWhy it grows (lecture): heated gas particles move faster and push harder on the balloon walls, so the balloon expands until the pressure inside matches outside.\n\nLab report due next Tuesday. Next lab: Boyle's law with syringes.","rules":[{"type":"numberedItems","count":3},{"type":"maxWords","max":80},{"type":"plainText"}],"mistakes":[{"title":"Asking for an explanation","why":"The AI explains the law in general and may skip your demo's numbers.","fix":"Ask for the math: \"Show the Kelvin conversions and the calculation.\"","checks":["r0","r1"]},{"title":"Missing the TA's correction","why":"Your notes have the wrong starting temperature next to the fix.","fix":"Add: \"Use the corrected 27°C.\"","checks":["r0"]},{"title":"Not saying how many lines","why":"The AI picks its own number, and it usually picks more lines than you need.","fix":"Be exact: \"Exactly 3 numbered lines.\"","checks":["numberedItems"]},{"title":"Skipping the why","why":"Numbers alone don't explain what's happening to the balloon.","fix":"Add: \"End with one sentence on why it grew.\"","checks":["r2"]},{"title":"Trusting the AI to count words","why":"AI is bad at counting. Ask for a total and it often lands 20% over.","fix":"Cap each line: \"each under 22 words.\"","checks":["maxWords"]},{"title":"Forgetting where it will be read","why":"AI formats for a screen, with bold and headings that show up as stray symbols in your lab report.","fix":"Say: \"Plain text, no bold, no headings.\"","checks":["plainText"]}],"promptHints":[{"label":"Asks for Kelvin","patterns":["kelvin","\\+ ?273"]},{"label":"Asks to show the math","patterns":["show.{0,15}(math|work|calculation|setup)","v1 ?/ ?t1"]},{"label":"Uses the correction","patterns":["27","correct","TA"]},{"label":"Says how many lines","patterns":["\\b(3|three)\\b.{0,25}line"]},{"label":"Sets a length limit","patterns":["\\d+\\s*words","word (limit|count)","under \\d+"]}],"hint":"Gas law problems go wrong at the Kelvin step. Ask the AI to show the conversions and the setup on separate lines, use the corrected temperature, and end with the why.","rubricLabels":["Line 1 converts both temperatures to Kelvin with the math shown, using the corrected 27°C: 27 + 273 = 300 K and 87 + 273 = 360 K","Line 2 shows the setup and result: V2 = 2.0 L x 360 / 300 = 2.4 L (any clear equivalent setup is fine)","Line 3 explains in one sentence that heated gas particles move faster and push harder on the walls, and nothing uses 17°C or Celsius in the calculation"]}