# Concept Map: Thermochemical Changes (Chemistry 30)

Central concept: **Thermochemical Changes**

## Connections

- Thermochemical Changes (includes) -> Definitions
- Thermochemical Changes (governed by) -> Laws
- Thermochemical Changes (quantified by) -> Calculations
- Thermochemical Changes (represented by) -> Diagrams
- Thermochemical Changes (investigated via) -> Lab Methods
- Thermochemical Changes (applied to) -> Applications
- Definitions (defines) -> Enthalpy
- Definitions (defines) -> Molar Enthalpy
- Definitions (uses) -> ΔH Notation
- Definitions (classifies as) -> Exo/Endothermic
- Definitions (explained by) -> Bond Energy Changes
- Laws (states) -> Hess' Law
- Laws (uses) -> Standard Enthalpies of Formation
- Laws (expressed in) -> Balanced Energy Equations
- Calculations (applies) -> Q = mcΔt
- Calculations (analyzes) -> Calorimetry Data
- Calculations (performs) -> Hess' Law Calculations
- Hess' Law Calculations (applies) -> Hess' Law
- Diagrams (drawn as) -> Energy Diagrams
- Energy Diagrams (labels) -> Activation Energy
- Activation Energy (lowered by) -> Catalysts
- Lab Methods (measures) -> Calorimetry Technique
- Lab Methods (tests) -> Hess' Law Lab
- Calorimetry Technique (produces) -> Calorimetry Data
- Hess' Law Lab (informs) -> Hess' Law Calculations
- Applications (evaluates) -> Fuels & Energy Efficiency
- Applications (includes) -> Biological Processes
- Biological Processes (illustrates) -> Exo/Endothermic

## Notes

- **Thermochemical Changes**: Study of energy changes in chemical reactions and their impacts on society ([Topic](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23632)) [Topic](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23632)
- **Definitions**: Core vocabulary for describing energy changes in reactions ([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/23636)
- **Enthalpy**: Heat content of a system defined for chemical reactions ([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/23636)
- **Molar Enthalpy**: Enthalpy change per mole of substance reacting ([Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23636), [Topic](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23632)) [Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23636), [Topic](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23632)
- **ΔH Notation**: Symbol used to communicate and calculate energy changes ([Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23638)) [Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23638)
- **Exo/Endothermic**: Classification of reactions by direction of energy flow, e.g. photosynthesis, combustion ([Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23643)) [Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23643)
- **Bond Energy Changes**: Energy changes explained by bonds breaking/forming and potential/kinetic energy shifts ([Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23652)) [Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23652)
- **Laws**: Governing principles used to calculate reaction enthalpies ([Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23640), [Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23639)) [Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23640), [Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23639)
- **Hess' Law**: Net reaction enthalpy calculated from a series of reactions ([Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23640)) [Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23640)
- **Standard Enthalpies of Formation**: Used to predict enthalpy change for chemical equations ([Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23639)) [Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23639)
- **Balanced Energy Equations**: Equations written to include energy changes ([Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23637)) [Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23637)
- **Calculations**: Quantitative methods for determining energy changes ([Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23634), [Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23641)) [Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23634), [Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23641)
- **Q = mcΔt**: Formula recalled and applied to analyze heat transfer ([Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23634)) [Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23634)
- **Calorimetry Data**: Used to determine enthalpy changes in chemical reactions ([Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23641)) [Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23641)
- **Hess' Law Calculations**: Combining reaction steps to calculate molar enthalpy of combustion for magnesium ([Resource](https://goa-cc-uat-aili-app-001.azurewebsites.net/library/resource/ilq8dxecf0Kj2o9IxANh0g), [Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23640)) [Resource](https://goa-cc-uat-aili-app-001.azurewebsites.net/library/resource/ilq8dxecf0Kj2o9IxANh0g), [Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23640)
- **Diagrams**: Visual representations of energy changes during reactions ([Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23653)) [Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23653)
- **Energy Diagrams**: Diagram: potential energy vs reaction progress, showing reactant and product levels, activation energy peak, and enthalpy change arrow ([Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23653)) [Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23653)
- **Activation Energy**: Energy barrier labelled on energy diagrams ([Topic](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23632), [Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23653)) [Topic](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23632), [Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23653)
- **Catalysts**: Substances that lower activation energy, a key concept in the unit ([Topic](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23632)) [Topic](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23632)
- **Lab Methods**: Experimental approaches for measuring and applying enthalpy relationships ([Resource](https://goa-cc-uat-aili-app-001.azurewebsites.net/library/resource/YlIUl7k3G0y6R-b8XyPAGw), [Resource](https://goa-cc-uat-aili-app-001.azurewebsites.net/library/resource/ilq8dxecf0Kj2o9IxANh0g)) [Resource](https://goa-cc-uat-aili-app-001.azurewebsites.net/library/resource/YlIUl7k3G0y6R-b8XyPAGw), [Resource](https://goa-cc-uat-aili-app-001.azurewebsites.net/library/resource/ilq8dxecf0Kj2o9IxANh0g)
- **Calorimetry Technique**: Inquiry-based measurement of heat transfer in reactions ([Resource](https://goa-cc-uat-aili-app-001.azurewebsites.net/library/resource/YlIUl7k3G0y6R-b8XyPAGw)) [Resource](https://goa-cc-uat-aili-app-001.azurewebsites.net/library/resource/YlIUl7k3G0y6R-b8XyPAGw)
- **Hess' Law Lab**: Guided procedure combining reactions to find molar enthalpy of magnesium combustion ([Resource](https://goa-cc-uat-aili-app-001.azurewebsites.net/library/resource/ilq8dxecf0Kj2o9IxANh0g)) [Resource](https://goa-cc-uat-aili-app-001.azurewebsites.net/library/resource/ilq8dxecf0Kj2o9IxANh0g)
- **Applications**: Real-world relevance of thermochemical study to society and environment ([Topic](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23632)) [Topic](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23632)
- **Fuels & Energy Efficiency**: Evaluation of fuels and sustainable energy use ([Topic](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23632), [Resource](https://goa-cc-uat-aili-app-001.azurewebsites.net/library/resource/YlIUl7k3G0y6R-b8XyPAGw)) [Topic](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23632), [Resource](https://goa-cc-uat-aili-app-001.azurewebsites.net/library/resource/YlIUl7k3G0y6R-b8XyPAGw)
- **Biological Processes**: Photosynthesis and cellular respiration classified as endo/exothermic ([Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23643)) [Outcome](https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23643)

![Concept Map: Thermochemical Changes (Chemistry 30)](https://goa-cc-uat-aili-app-001.azurewebsites.net/api/generate/a4bdbbb6-8093-48f5-bc6a-0ca2f277fb6c/asset/255)

---
*AILI word map · language en · model claude-sonnet-5 · generated 2026-09-17 · id a4bdbbb6-8093-48f5-bc6a-0ca2f277fb6c*

### Sources

- node:n1: Chemistry › Chemistry (20, 30) › Chemistry 30 (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23632)
- node:n2: Chemistry › Chemistry (20, 30) › Chemistry 30 › Unit A: Thermochemical Changes (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23633)
- node:n3: Chemistry › Chemistry (20, 30) › Chemistry 30 › Unit A: Thermochemical Changes (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23650)
- node:n4: Chemistry › Chemistry (20, 30) › Chemistry 30 › Unit A: Thermochemical Changes (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23633)
- 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/23638)
- 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/23641)
- 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/23640)
- resource:r1: Resources › type#studentsupport, type#teachersupport › SCN3796 (https://goa-cc-uat-aili-app-001.azurewebsites.net/library/resource/YlIUl7k3G0y6R-b8XyPAGw)
- node:n8: Chemistry › Chemistry (20, 30) › Chemistry 30 › Unit A: Thermochemical Changes › General Outcome 2 (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23652)
- node:n9: Chemistry › Chemistry (20, 30) › Chemistry 30 › Unit A: Thermochemical Changes › General Outcome 1 (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23639)
- node:n10: Chemistry › Chemistry (20, 30) › Chemistry 30 › Unit A: Thermochemical Changes › General Outcome 1 (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23643)
- node:n11: 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:n12: Chemistry › Chemistry (20, 30) › Chemistry 30 › Unit A: Thermochemical Changes › General Outcome 2 (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23653)
- node:n13: 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:n14: Chemistry › Chemistry (20, 30) › Chemistry 30 › Unit A: Thermochemical Changes › General Outcome 1 (https://goa-cc-uat-aili-app-001.azurewebsites.net/explore/node/23637)
- resource:r2: Resources › type#activity › SCN3796 (https://goa-cc-uat-aili-app-001.azurewebsites.net/library/resource/ilq8dxecf0Kj2o9IxANh0g)