Thermochemistry Terms Flashcards
Thermal Energy
KE associated w/ total random motion of molecules. It is proportional to temperature.
Work
Form of energy — energy required to move an object through given distance
Potential Energy (PE)
Energy stored in object b/c of its position or composition
System
Specific part of the universe
Three types of systems:
Isolated, Closed, & Open
Surroundings
Everything else
Isolated system
No exchange in energy/matter with surroundings
Ex. Soup in Thermos bottle
Closed system
Exchange in matter, but not surroundings
Ex. A cup of hot soup with a lid on
Open system
Exchange in both matter & surroundings
Ex. An open cup of hot soup
Electrostatic Potential Energy (Eel)
Proportional to product of charges of particles & distance between particles
Exothermic
Energy exiting
↓ ∆Heat
Endothermic
Energy Entering
↑∆Heat
Internal Energy
Sum of All Kinetic & Potential Energy of All components of a system
