1.1 What is Chemistry?

17.3. Enthalpy and Phase Transitions http://www.ck12.org Some materials have negative heats of solution; the dissolution of one ...

http://www.ck12.org Chapter 17. Thermochemistry Molar heats of fusion and vaporization allow calculations of energy changes inv ...

17.4 Hess’s Law 17.4 Hess’s Law Lesson Objectives State Hess’s law. Use Hess’s law to calculate standard enthalpy of formation ...

http://www.ck12.org Chapter 17. Thermochemistry In other words, the overall enthalpy change does not depend on how you got from ...

17.4. Hess’s Law http://www.ck12.org reverse the second known equation, NO 2 (g) will be a product. When reversing the direction ...

http://www.ck12.org Chapter 17. Thermochemistry CS 2 (l)→C(s)+2S(s) ∆H=− 87 .9 kJ/mol C(s)+O 2 (g)→CO 2 (g) ∆H=− 393 .5 kJ/mol 2 ...

17.4. Hess’s Law http://www.ck12.org Further Reading / Supplemental Link Hess’s Law: http://www.science.uwaterloo.ca/~cchieh/ca ...

http://www.ck12.org Chapter 17. Thermochemistry 18.4 References Department of Energy, User:Helix84/Wikimedia Commons. http://co ...

http://www.ck12.org CHAPTER 18 Kinetics Chapter Outline 18.1 Rates of Reactions 18.2 RATELAWS 18.3 REACTIONMECHANISMS 18.4 REFER ...

http://www.ck12.org Chapter 18. Kinetics Drag racing involves one basic issue: who can get to the finish line the fastest. The s ...

18.1. Rates of Reactions http://www.ck12.org 18.1 Rates of Reactions Lesson Objectives Define “rate.” Describe collision theory ...

http://www.ck12.org Chapter 18. Kinetics What is a Rate? When studying chemical reactions, we are interested in how quickly the ...

18.1. Rates of Reactions http://www.ck12.org FIGURE 18.1 Collision Theory Collision theorystates that chemical reactions occur w ...

http://www.ck12.org Chapter 18. Kinetics FIGURE 18.2 Activation energy for an exothermic reac- tion. FIGURE 18.3 Formation of ac ...

18.1. Rates of Reactions http://www.ck12.org experience much more frequent car collisions than a fairly empty neighborhood stree ...

http://www.ck12.org Chapter 18. Kinetics mentally, the temperature of a substance is a measure of the average kinetic energy of ...

18.1. Rates of Reactions http://www.ck12.org FIGURE 18.7 ments for breaking the H-H bond are offset somewhat if each hydrogen at ...

http://www.ck12.org Chapter 18. Kinetics FIGURE 18.8 ...

18.1. Rates of Reactions http://www.ck12.org Catalytic converters in cars increase the rates of several important reactions. Unb ...

http://www.ck12.org Chapter 18. Kinetics Consider the following reaction: N 2 +3H 2 →2NH 3. At a certain point in the reaction, ...