1. Thermochemistry
Vocabulary

2. calorie
___ , abbr. cal, unit of heat energy in the metric system.

3. calorimeter
A ___ is an apparatus for measuring quantities of heat.

4. chemical energy
Energy liberated by a chemical reaction or absorbed in the formation of a chemical compound is referred to as ____.

5. endothermic
___ a reaction in which heat is absorbed in going from reactants to products. The reactants are at a lower energy state than the products and energy is absorbed in the reaction.

6. energy
___ is the ability or capacity to do work or to produce change. Forms include heat, light, sound, electricity, and chemical energy.

7. exothermic
____is a reaction in which heat is given off (released) when going from reactants to products. The reactants start off at a higher energy state than the products, so energy is released in going from reactants to products.

8. heat
___ is not the same as temperature; nonmechanical energy in transit, expressed as either calories or joules.

9. joule
The SI unit of work or energy is the ___.

10. kilocalorie
____ - often written as Calorie, big Cal is equal to 1000 calories.

11. kinetic energy
___ is the form of energy that an object has by reason of its motion. We call it the energy of movement.

12. Law of Conservation of Energy
The _____ states that energy is neither created nor destroyed in any process - it is conserved.

13. phase change
A change from one state (solid or liquid or gas) to another without a change in chemical composition is called a ____.

14. potential energy
Energy stored by an object by virtue of its position is called ____. Similarly, a stretched spring has stored energy that is released when the spring is returned to its unstretched state. Other forms include electrical energy, chemical energy, and nuclear energy.

15. specific heat
____ is the amount of heat it takes to raise 1g of a substance by 1 degree C.

16. temperature
____ describes the amount of motion of particles.

17. thermal energy
Energy that has to do with heat is called ____.

18. thermochemistry
_____ is concerned with heat changes that occur during chemical reactions.