Thermal Energy in Chemical Reactions

Front

Kinetic Energy Noun

---

[ki-net-ik en-er-jee]

Back

Kinetic Energy

---

The form of energy that an object or a particle has by reason of its motion.

---

Example: A moving car has kinetic energy because of its mass and speed, shown with labels and formula.

Front

Thermal Energy Noun

---

[thur-muhl en-er-jee]

Back

Thermal Energy

---

The total kinetic energy of the moving atoms or molecules in a substance, which is related to its temperature.

---

Example: Particles in a hot area move faster, transferring thermal energy to a cooler area.

Front

Potential Energy Noun

---

[puh-ten-shuhl en-er-jee]

Back

Potential Energy

---

The stored energy in an object or system because of its position or the arrangement of its parts.

---

Example: A spring stores potential energy when compressed or stretched, shown with arrows indicating changes.

Front

Bond Energy Noun

---

[bond en-er-jee]

Back

Bond Energy

---

The amount of potential energy required to break a particular chemical bond between two atoms in a molecule.

---

Example: The image shows how bond energy is involved in breaking and forming bonds in a water molecule.

Front

Law of Conservation of Energy Noun

---

[law uv kon-ser-vey-shuhn uv en-er-jee]

Back

Law of Conservation of Energy

---

The fundamental principle stating that energy cannot be created or destroyed, only changed from one form to another.

---

Example: A pendulum demonstrates the Law of Conservation of Energy by converting potential energy to kinetic energy and back.

Front

System Noun

---

[sis-tuhm]

Back

System

---

In chemistry, the specific portion of the universe, such as a chemical reaction, that is being studied.

---

Example: This image shows a chemical reaction system with reactants turning into products, illustrating energy changes.

Front

Surroundings Noun

---

[suh-roun-dingz]

Back

Surroundings

---

Everything outside of a defined chemical system that can exchange energy or matter with the system.

---

Example: A system is surrounded by its surroundings, separated by a boundary, allowing energy exchange.

Front

Equilibrium Noun

---

[ee-kwuh-lib-ree-uhm]

Back

Equilibrium

---

A state in which the energy between a system and its surroundings is balanced, resulting in no net change.

---

Example: A chemical reaction in a flask shows no net change in mass, illustrating equilibrium.

Front

Temperature Noun

---

[tem-per-uh-cher]

Back

Temperature

---

A quantitative measure of the average kinetic energy of the particles that make up a substance.

---

Example: Particles in a hot area move faster than in a cold area, showing temperature differences.

Front

Heat Noun

---

[heet]

Back

Heat

---

The transfer of thermal energy from a substance at a higher temperature to one at a lower temperature.

---

Example: Heat transfer from hot to cold areas is shown with arrows between red and blue particles.