Thermal Processes in Chemistry

Freezing Water into Ice Cubes: Molecules lose energy transitioning from liquid to solid.
Condensation: Occurs when vapor turns into liquid, requiring molecules to lose energy.
Burning Methane Gas: Activation energy (spark) is less than the energy released, evident as thermal and radiant energy.
Burning a Candle: The activation energy from a match is minimal compared to the energy released as heat and light.
Glow Stick Reaction: Produces mostly radiant energy with some thermal energy released.
Bioluminescent Organisms: Such as fireflies, emit radiant energy with minor thermal output.
Cellular Respiration: Consumers break down food, releasing more thermal energy than ingested.
Lighting a Match: Releases more thermal energy than needed to initiate combustion.
Air Activated Hand Warmers: Chemical reaction results in the release of thermal energy into the environment.
Warm Chemical Reactions: Indicate that thermal energy is released to the surroundings.

Boiling Water: Requires molecules to gain energy to transition from liquid to gas.
Evaporation: Similar to boiling, involves molecules gaining energy to become gas.
Melting Chocolate: Involves molecules gaining energy to transition from solid to liquid.
Baking a Cake: Requires input of thermal energy for the reaction to occur.
Cooking an Egg: More energy is necessary to facilitate the chemical changes during cooking.
Activating a Cold Pack: Absorbs thermal energy, creating a cooling effect due to transformation into chemical energy.
Baking Soda and Vinegar Reaction: This reaction feels cold as thermal energy is absorbed and transformed.
Cold Chemical Reactions: Indicate that thermal energy is absorbed during the process.
Dry Ice Formation: The sublimation of dry ice creates "fog," requiring energy gain to transition from solid to gas.