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Unit 3 Lesson 2: Chemical Reactions Please Complete an Audio Setup Grab
you SUPER FANTASTIC Science Notebook!
Review for Unit 3 Lesson 1: Bonding
• What type of bond share electrons?___________________
• What type of bond gain and loses electrons? ________________
• What are the outer energy level electrons called?
__________________
MVCA Mission O The mission of the Michigan Virtual Charter
Academy is to provide an innovative, intensive
academic preparation that inspires and educates
students to achieve the highest levels of academic
knowledge and skills. Michigan Virtual Charter
Academy embraces a collaborative partnership
between teachers and parents in order to empower
students to reach extraordinary heights.
Extraordinary results require extraordinary efforts!
Through commitment hard work, consistency, and
responsibility, every student will meet the challenge
of mastering high expectations.
Objectives O Students will be able to…
O Explain how reactants enter into chemical reactions that results in products.
O Recognize that chemical reactions may involve the formation of a precipitate, the generation of a gas, or a change in color.
O Explain the difference between an exothermic and endothermic reaction.
Beautiful Chemistry
O Click on the video link below and watch the
video.
O http://vimeo.com/107976057
O I will call you back after 2 minutes
O What did you like from the video?
What do you think a chemical reaction is?
Chemical Reactions
O Chemical reaction: the process by which one
or more substances change to produce one
or more different substances.
O The process of breaking and forming bonds.
Parts of a Chemical Reaction O Reactants: the starting molecules in a chemical reaction.
O Substances that react together
O Products: the molecules that result from a chemical reaction.
O What is produced in the reaction
C3H8 + 5O2 3CO2 + 4H2O
Reactants Products
The chemical reaction produced
new compounds (products) with
different properties than the
compounds in the reactants!
What type of change took
place?
Chemical Reactions
Exothermic Reaction: A chemical reaction in which energy (heat) is released. *Hint-Think of the word “Exit.”
Endothermic Reaction: A chemical reaction that requires energy (heat is absorbed). *Hint-Think of the word “Enter.”
Temperature goes UP during a chemical reaction!
Temperature goes DOWN during a chemical reaction!
“Exo” means…go out or exit “Thermic” means…heat or energy
“Endo” means…go in “Thermic” means…heat or energy
Example:
2H2O + ENERGY 2H2 + O2
Example:
2Na + Cl2 2NaCl + ENERGY
Which chemical reaction is it?
O Click on the link below to watch a video.
O http://safeshare.tv/w/xXkMuxHEGX
O Think about what type of reaction it is and
how do you know it is a chemical reaction
taking place.
O Give me a green check when you are
finished watching the movie!
What did you observe?
Combustion O Combustion Reaction: an
exothermic reaction in
which oxides are usually
formed.
O We get energy from fuels as
the result of combustion
reactions.
Use Polling Tools!
A combustion reaction is an
exothermic reaction. Is energy…
A.) Absorbed
B.) Released
What happens to the
temperature during a
combustion reaction?
A.) Temperature increases
B.) Temperature decreases
Decomposition Reaction
O Decomposition reaction: a kind of chemical
reaction in which a single compound is
broken down into two or more simpler
compounds.
O Example:
O H2O + ENERGY H2 + O2
Signs of Chemical Reactions
Solid Formation (precipitate)
*Precipitate: is a solid substance produced as a result
of a chemical reaction in a solution.
Gas Formation
(gas/bubbles) Color Change
Hint: Look for a NEW substance being produced to
identify if it is a chemical reaction.
Activity Time!
O Get ready to use your observational skills!
O Click on the video link below:
O http://safeshare.tv/w/gdRVCQnGeH
O Make some observations and be ready to
share when we return.
O Give me a green check when you are
finished watching the movie
What did you observe?
When you open a pop it might fizz. Is that an example of a chemical reaction
taking place? Why or why not?
Here are some of the fun activities: • Chat room • Whiteboard room • Word Searches • Checkers • Sudoku Puzzles • Tic Tac Toe • Web Cam
How can you be invited? Complete 10 questions in all 4 of
your Science topics in Study Island by October 30th (4pm).
O Click on the link below and answer the questions. Remember to try your best! This gives us a quick snapshot of how you are doing with the lessons taught today It also is how I am taking attendance!
O https://docs.google.com/forms/d/1MYZNs9Uw1s5ug5yUp-0wxKGF3DFwT-HDI_iJwU_GmQ0/viewform?usp=send_form
O When you are finished submitting the Exit Ticket, you may leave class Go and take Unit 3 Lesson 2 Chemical Reactions assessment in the OLS. Have a wonderful day!
O If you have questions raise your hand!
Exit Ticket!
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