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Chapter 13: Chemical Energetics - Coggle Diagram
Chapter 13: Chemical Energetics
What are endothermic and exothermic changes?
Exothermic reactions
definition: release of thermal energy to the surrounding
effect: increase surrounding temperature
physical processes
freezing
dissolving of anhydrous salts
condensation
dissolution of acids and alkalis in water
chemical reactions
neutralisation
corrosion of metals/rusting of iron
respiration
reaction phase -- bond making/forming
combustion/burning
Endothermic reactions
definition: absorbs thermal energy from the surrounding
effect: decrease surrounding temperature
physical processes
melting
sublimation
boiling/evaporation
dissolving of some ionic compounds, e.g. NaCl, NH4Cl and Ba(NO3)2 in water
chemical processes
photosynthesis
thermal decomposition
reaction phase -- bond breaking