06 Thermochemistry

Energy

The ability to do work or transfer heat.

Kinetic Energy

Energy of motion.

Potential Energy

Energy due to position relative to a reference point.

Chemical Energy

Stored in the bonds of chemical compounds due to electrical and magnetic attractions.

Thermal Energy

Caused by movement of atoms or molecules.

Nuclear Energy

Produced from atomic reactions.

Releases heat and light.

Fusion

Nuclei combine, releasing energy.

Fission

Nucleus splits into smaller nuclei, also releasing energy.

Radiation

Energy transmitted as rays, waves, or particles.

Includes visible light, infrared, and ultraviolet radiation.

Exothermic Reactions

Release heat/light.

Products have less enthalpy than reactants.

Endothermic Reactions

Absorb heat/light.

Products have more enthalpy than reactants.

Hess’s Law

Total enthalpy change of a reaction is the sum of the enthalpies of its individual steps.

Based on the law of conservation of energy.

Thermo

Is a determinant and a word forming element that relates to heat, warmth, hot, temperature or thermal energy.

Thermochemistr

The brank of chemistry that deals with the study of energy changes, especially heat, that occur during chemical reactions and physical changes.

Electrical Energy

The energy caused by the movement of electric charges.