Chem Mod 9 Vocab

3. the heat energy given out when one mole of a substance burns completely in oxygen
4. the extent of a reaction when it is at equilibrium
7. chemical reaction where the reactants form products that, in turn, react together to give the reactants back
9. the amount of energy that is transferred from one system to its surroundings because of a temperature difference
10. the measurement of energy in a thermodynamic system
12. condition in the course of a reversible chemical reaction in which no net change in the amounts of reactants and products occurs
14. everything that is not a part of the system
19. the energy stored in the chemical bonds of a substance
21. unit of work or energy in the International System of Units
23. the amount of energy is neither created nor destroyed
25. physical destruction of an object that is exposed to intense heat

1. one in which all species are present in the same phase
2. one in which species exist in more than one phase
5. the quantity of heat required to raise the temperature of one gram of a substance by one Celsius degree
6. change in one of the variables that describe a system at equilibrium produces a shift in the position of the equilibrium that counteracts the effect of this change
8. the study of heat and energy related to various physical transformations and chemical reactions
11. reaction in which the conversion of reactants to products and the conversion of products to reactants occur simultaneously
13. effect on an equilibrium when one or more species in the reaction is shared with another reaction.
15. the amount of energy needed to change one mole of a substance from the solid phase to the liquid phase at constant temperature and pressure
16. a device used to measure the heat flow of a chemical reaction or physical change
17. A system is the set of substances and energy that is being studied
18. when the rate of the forward reaction equals the rate of the reverse reaction
20. the capacity to supply heat or do work
22. condition in the course of a reversible chemical reaction in which no net change in the amounts of reactants and products occurs
24. the amount of energy needed to warm 1 g of H2O by 1°C