Thermochemistry Vocab

3. the transfer of energy from one system or substance to another
4. base unit of thermodynamic temperature measurement
9. process by which water vapor is changed into liquid water
12. the change from a liquid state to a gaseous state without boiling the liquid
14. a reaction or process that is accompanied by or requires the absorption of heat
15. a state of matter where particles flow freely and have a definite volume but not shape
16. temperature scale based on 0 degrees for the freezing point of water and 100 degrees as the boiling point of water
17. a state of matter consisting of particles that have neither a definite volume nor definite shape
18. a gas phase substance that normally exists as a liquid or solid
20. the SI unit of work, heat, and energy

1. the temperature at which the vapor pressure of a liquid equals the external pressure surrounding the liquid
2. the temperature at which a liquid becomes a solid
5. a measure of the average kinetic energy of the atoms or molecules in the system
6. the process of changing from a solid to a gas without passing through a liquid phase
7. temperature at which a thermodynamic system has the lowest energy and movement
8. a process or reaction that releases energy in the form of heat
10. rapid vaporization of a liquid
11. a state of matter where a substance retains its shape and density
13. the temperature at which a substance changes from a solid to a liquid
19. the process by which a substance changes from the solid state to a liquid one