1. Liberty Christian Academy General Chemistry Miss Kostura Chapter 14Chemical Reactions

2. Forming New Substances What is the difference?

6. Dissolved under pressure = carbonated beverages

7. CO2 gas is not combustible & is denser than air= fire extinguishers

8. dry ice/solid CO2 = cooling effect, better than ice

10. Then atoms rearrange.

12. Oxygen = O

13. Nitrogen = N

16. H2O tells you that a water molecule is composed of 2 hydrogen atoms and 1 oxygen atom.

19. Na2SO4

22. The lack of a prefix indicates only 1 atom.

23. The prefix di indicates 2 atoms… etc.Example: carbon dioxide = CO2 dinitrogen monoxide = N2O

28. Forming New Substances Reactants Products Example: C + O2 CO2 Charcoal for barbecuing contains C. The C reacts with O in the air, and the primary product is CO2.

32. Mode: as H burns, water is the only product.

34. Atoms are never lost or gained in a chemical equation.

38. Forming New Substances Review Questions Page 357 #1 - 5

39. Types of Chemical Reactions Types of Chemical Reactions Synthesis Reactions Decomposition Reactions Single-Replacement Reactions Double-Replacement Reactions

40. Types of Chemical Reactions What happens when something decomposes? What happens when something synthesizes?

41. Types of Chemical Reactions Synthesis Reaction def: a reaction in which two or more substances combine to form a single compound. Example: A + B AB 2Na + Cl2 2NaCl

42. Types of Chemical Reactions Decomposition Reaction def: a reaction in which a single compound breaks down to form two or more simpler substances. Example: AB A + B H2CO3 H2O + CO2

43. Types of Chemical Reactions Single-Replacement Reaction def: a reaction in which an element takes the place of another element that is part of a compound. Note: the products are a new compound and a different element. Example: A + BC AC + B Zn + 2HCL ZnCl2 + H2

44. Types of Chemical Reactions Double Replacement Reaction def: a reaction in which ions in two compounds switch places. One of the products of this reaction is often a gas or a precipitate. Example: AB + CD AD + CB NaCl + AgFNaF + AgCl

45. Types of Chemical Reactions Review Questions Page 360 # 1 & 2

47. During a reaction, the chemical bonds that hold the reactants together are broken as they absorb energy.

52. Law of conservation of energydef: energy can neither be created or destroyed

63. Energy & Rates of Chemical Reactions Chapter Review Quesitons Page 368 # 1-13, 15, 17-19, 21