INDEX of ENERGY CHANGES - THERMAL ENERGY TRANSFER Notes

Doc Brown's Chemistry KS4 GCSE 9-1, IGCSE, O level & A level Revision Notes

INDEX of Exothermic and Endothermic Energy Changes Revision Notes

Energetics Introduction -  energy transfers in physical state changes and chemical reactions, simple calorimetry, calculations etc.

GCSE Chemistry Revision notes

Energy changes are an important facet of chemical reactions. The interaction of molecules or ions often involves changes in energy due to the breaking and forming of bonds. Chemical reactions which release energy are called exothermic reactions, and those that take in (absorb) heat energy are endothermic. These energy transfer changes produce heating or cooling effects that can be used in a range of everyday applications.

Interactions between ions in an electrolyte can be used to produce electricity e.g. in cells and batteries. The reverse can be carried out and electricity can also be used to split ionic substances and is a useful means of producing elements that are too expensive to extract any other way. These topics are dealt with in the electrochemistry sections (see end of energy changes index too).

If you are an Advanced A Level chemistry student, these pages will help as an introduction, but then you should follow the A Level links to the more advanced revision notes and calculation methods - link below. These revision notes on energy transfers in chemical reactions should prove useful for the new AQA chemistry, Edexcel chemistry & OCR chemistry GCSE (9–1, 9-5 & 5-1) science courses.

INDEX for ENERGY CHANGES (GCSE/IGCSE/O level Energetics)

1. Heat changes in chemical/physical changes - exothermic and endothermic

2. Reversible reactions and energy changes

3. Activation energy and reaction profiles

4. Catalysts and activation energy

5. Introduction to bond energy/enthalpy calculations

6. Calorimeter methods of determining energy changes and EXAMPLES of experiments you can do

7. Energy transfer calculations from calorimeter results

See ALSO LINKS to associated web pages

Fuel Cells  *  Simple Cells and Batteries  *  Electrochemistry - electrolysis

Advanced Level Energetics-Thermochemistry - Enthalpies of Reaction, Formation & Combustion

Foundation tier-easier GCSE multiple choice QUIZ on exothermic/endothermic reactions etc.

Higher tier-harder multiple choice GCSE QUIZ on exothermic/endothermic reactions etc.

Foundation tier-easier multiple choice GCSE QUIZ on exothermic/endothermic reactions etc.

Higher tier-harder multiple choice GCSE QUIZ on exothermic/endothermic reactions etc.

GCSE/IGCSE/O level notes on Oil-Fuel burning

GCSE/IGCSE/O level Types of Chemical Reaction Notes

GCSE/IGCSE/O Level Rates of Reaction Revision Notes