CK-12 Physical Science Concepts - For Middle School

3.21 Replacement Reactions 3.21 Replacement Reactions Define replacement reaction. Contrast single and double replacement react ...

http://www.ck12.org Chapter 3. Chemical Interactions Single Replacement Reactions A single replacement reaction occurs when one ...

3.21. Replacement Reactions http://www.ck12.org Summary A replacement reaction occurs when elements switch places in compounds. ...

http://www.ck12.org Chapter 3. Chemical Interactions 3.22 Combustion Reactions Write the general formula for a combustion react ...

3.22 Combustion Reactions FIGURE 3.32 The burning of charcoal is a combustion reaction. Combustion of Hydrocarbons The fuel that ...

http://www.ck12.org Chapter 3. Chemical Interactions Summary A complete combustion reaction occurs when a fuel reacts quickly w ...

3.23 Endothermic Reactions 3.23 Endothermic Reactions Define endothermic reaction. Describe the role of energy in endothermic r ...

http://www.ck12.org Chapter 3. Chemical Interactions Reactants + Energy→Products FIGURE 3.34 Note: ∆H represents the change in e ...

3.23. Endothermic Reactions http://www.ck12.org FIGURE 3.35 Vocabulary endothermic reaction: Chemical reaction that needs a con ...

http://www.ck12.org Chapter 3. Chemical Interactions 3.24 Exothermic Reactions Define exothermic reaction. Describe the role of ...

3.24 Exothermic Reactions FIGURE 3.36 Note: ∆H represents the change in en- ergy. If the energy produced in an exothermic reacti ...

http://www.ck12.org Chapter 3. Chemical Interactions FIGURE 3.37 Vocabulary exothermic reaction: Chemical reaction that release ...

3.25 Conservation of Energy in Chemical Reactions 3.25 Conservation of Energy in Chemical Reac- tions Summarize the role of ene ...

http://www.ck12.org Chapter 3. Chemical Interactions Q:If energy can’t be destroyed during a chemical reaction, what happens to ...

3.26 Activation Energy 3.26 Activation Energy Define activation energy. Explain why all chemical reactions require activation e ...

http://www.ck12.org Chapter 3. Chemical Interactions Q:It makes sense that endothermic reactions need activation energy. But do ...

3.26. Activation Energy http://www.ck12.org What is the exothermic reaction in the video? What role does the flame play in this ...

http://www.ck12.org Chapter 3. Chemical Interactions 3.27 Chemical Reaction Rate Define chemical reaction rate. Identify factor ...

3.27 Chemical Reaction Rate collide with greater force. For example, food spoils because of chemical reactions, and these reacti ...

http://www.ck12.org Chapter 3. Chemical Interactions Surface Area of Reactants When a solid substance is involved in a chemical ...