Safety boundary
Use virtual equilibrium perturbations and supplied datasets only; no unsupervised color-change chemistry.
Explicit chemistry instruction
Temperature is special because it changes K, not just Q.
Heating favors the endothermic direction while cooling favors the exothermic direction in the simplified model.
Treating heat as a reactant/product is bookkeeping shorthand rather than a literal species model.
Vocabulary: temperature; K; endothermic; exothermic; equilibrium constant.
Worked example
For an exothermic forward reaction, heating tends to favor the reverse direction and changes K.
Guided question
Why is temperature different from adding reactant?
Independent work
- Predict four temperature responses.
- Use the sign of ΔH.
- Identify which perturbation changes K.
Misconception check
A catalyst does not change K or equilibrium position.
Formative check
What common perturbation changes K directly?
Reveal response
Temperature.
Mentor evidence conference
Ask Archaemenes to audit whether Q, K, and rate effects are being kept distinct.
Teacher guidance
Foundation: Use ΔH labels.
Core: Predict temperature effects.
Extended: Connect response with thermodynamic reasoning.