# Heat and Energy in Reactions

When you burn fuel or mix chemicals, energy moves from one place to another, sometimes so quickly you can feel it.

**Describe a moment when you observed or felt heat energy transfer during a chemical reaction or combustion. What evidence told you energy was moving? Use the equation Q = mcΔt ([Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23634)) to explain why the temperature changed, then define what enthalpy means for that reaction ([Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23636), [Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23641)).**

### Where to start

- What did you see, hear, or feel that showed energy was being released or absorbed?
- How would you measure the temperature change if you repeated the reaction in a calorimeter ([Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23647))?
- Why does the mass of the substance matter when calculating heat energy?
- What is the difference between heat energy (Q) and enthalpy (ΔH) ([Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23638))?

### Stretch

Design a calorimeter experiment to measure the molar enthalpy change of a reaction you choose. What data would you collect, and how would you use ΔH notation to report your results ([Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23648))?

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*AILI prompt · language en · model claude-haiku-4-5-20251001 · generated 2026-09-17 · id fe3ac5f1-3275-4503-ba9a-1c7e21e33b8b*

### Sources

- node:n1: Chemistry › Chemistry (20, 30) › Chemistry 30 › Unit A: Thermochemical Changes › General Outcome 1 (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23636)
- node:n2: Chemistry › Chemistry (20, 30) › Chemistry 30 › Unit A: Thermochemical Changes › General Outcome 1 (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23634)
- node:n3: Chemistry › Chemistry (20, 30) › Chemistry 30 › Unit A: Thermochemical Changes › General Outcome 1 (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23641)
- node:n4: Chemistry › Chemistry (20, 30) › Chemistry 30 › Unit A: Thermochemical Changes › General Outcome 1 (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23647)
- node:n5: Chemistry › Chemistry (20, 30) › Chemistry 30 › Unit A: Thermochemical Changes › General Outcome 1 (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23634)
- node:n6: Chemistry › Chemistry (20, 30) › Chemistry 30 › Unit A: Thermochemical Changes › General Outcome 1 (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23636)
- resource:r1: Resources › type#activity › SCN3796 (https://goa-cc-uat-aili-app-001.azurewebsites.net/library/resource/9ykNTynh306g6EnZlkTITQ)
- node:n7: Chemistry › Chemistry (20, 30) › Chemistry 30 › Unit A: Thermochemical Changes › General Outcome 1 (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23638)
- node:n8: Chemistry › Chemistry (20, 30) › Chemistry 30 › Unit A: Thermochemical Changes › General Outcome 1 (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23648)
- resource:r2: Resources › type#activity › SCN3796 (https://goa-cc-uat-aili-app-001.azurewebsites.net/library/resource/0uxhxD914kqzmssVwCK4tg)