THERMOCHEMISTRY

4. The measure of the spontaneous dispersal of energy at a specific temperature: how much energy is spread out, or how widely spread out energy becomes
5. States that enthalpy changes of reactions are additive
8. Experience no change in volume
9. Graphs that show the temperatures and pressures at which a substance will be thermodynamically stable in a particular phase
10. A specific type of vaporization that occurs only under certain conditions
11. System releases heat (deltaQ<0)
13. Energy spontaneously disperses from being localized to becoming spread out if it is not hindered from doing so
14. Occur when no heat is exchanged between the system and the environment; thus, the thermal energy of the system is constant through the process
15. The ability to do work
16. Implies that objects are in thermal equilibrium only when their temperatures are equal
17. Study of energy changes involved in physical and chemical changes
18. Equivalent to heat (Q) under constant pressure

1. Exchange of energy, not matter
2. The process of measuring transferred heat
3. Energy cannot be created or destroyed, only converted from one form to another
6. Liquid to solid
7. The system cannot exchange energy (heat and work) or matter with the surroundings; for example an insulated bomb calorimeter
8. The pressure of the system is constant
11. Processes in which systems absorb heat; delta Q >0
12. Phase boundary that separates the solid and liquid phases terminates at a point called the critical point