Canonical lesson CHEMISTRY20-U2-L09 · outcome 20-B1.3s · depth CURRICULUM_BASELINE

Unit B: Gases - outcome 20-B1.3s

• Course: CHEMISTRY20 (SCN2796)
• Lesson ID: CHEMISTRY20-U2-L09
• Official outcome: 20-B1.3s (SKILL)
• Object type: canonical lesson (not a bootcamp session)
• Source: Alberta Chemistry 20 Program of Studies (2007, updated 2014)

Official outcome text

analyze data and apply mathematical and conceptual models to develop and assess possible solutions • graph and analyze experimental data that relate pressure and temperature to gas volume (AI-NS2) • identify the limitations of measurement (AI-NS4) • identify a gas based on an analysis of experimental data (AI-NS2) [ICT C7-4.2]

Learning intention

Meet 20-B1.3s with instruction, practice, and a check. The 10-session bootcamp does not replace this lesson.

Success criteria

1. Restate the outcome in classroom language without swapping in a different unit’s template.
2. Complete the worked-style task for this outcome.
3. Name the lab setting (classroom-supervised / teacher demo / dataset or simulation / forbidden).

Teaching

Analyze graphs of P vs V, V vs T; identify measurement limits; optionally identify a gas from molar-mass-from-volume data if provided.

Worked example

From a given table, plot V vs T (K) and comment on linearity; state one limitation (narrow T range).

Guided practice

1. Graph using kelvin; mark absolute-zero extrapolation as model-only.
2. Near-miss: titration curve pasted as gas analysis. Wrong-unit.

Independent practice

1. Compute an approximate slope and interpret.
2. Limitation of measurement sentence.
3. If molar-mass-from-volume given, show n = m/M and V relation once.

Diagram / whiteboard

Approved diagram id chem20-pv-boyle - P-V Boyle sketch (or gas law axes). Tutor may open the course whiteboard and display this id. Do not invent hazardous procedures on the board.

Checks for understanding

Use the formative evidence below as the exit check for this outcome. Correct the misconception named in this lesson before praising.

Misconception to repair

Forcing a line through (0 °C, 0) instead of 0 K.

Safety and lab register

Setting: Paper analysis. AI Tutor must not invent labs outside CHEM20_LOW_RESOURCE_LAB_REGISTER.csv.

Alberta Poison Control if a real exposure is occurring: 1-844-764-7669. The AI Tutor is not a poison centre.

Formative evidence

Graph + limitation + one calculation if data allow.

This is not a diploma. Mastery needs instruction + activity + check.

AI Tutor / human tutor

Ground on 20-B1.3s. No false praise. No invented procedures. No silent skip to a different unit. Human tutor if the student describes mixing bleach, tasting, or flames.

Provenance

Official POS wording from ALBERTA_SENIOR_HIGH_OFFICIAL_OUTCOMES.csv. Pack lesson written to replace Wave-4 contaminated canonical markdown.