1 – Chemical Reaction Basics 2 – Energy & Chemical Reactions 3 –Types of Chemical Reactions ...

transcript

1 – Chemical Reaction Basics 2 – Energy & Chemical Reactions 3 –Types of Chemical Reactions 4 – Types of Chemical Reactions

http://www.weldonryan.com/images/chemical_reaction_final.png

What part of atoms are affected during a chemical reaction?

When a chemical reaction occurs the atom are only rearranged. No new atoms are created!

http://lc.brooklyn.cuny.edu/smarttutor/core3_22/images/Atom_structure_new.gif

http://images.encarta.msn.com/xrefmedia/sharemed/targets/images/pho/t046/T046403A.jpg

What is happens during a chemical reaction? When a chemical reaction happens the

electrons form a ring and that changes strictly involve the motion of electrons.

Def: Chemical reaction- is a process involving one, two or more substances, characterized by a chemical change and yielding one or more product(s) which are different from the reactants.

What does reactants and Products mean?

Def: Reactants – the materials that exists before hat chemical reaction

Def : Products – Substances that are created by the chemical reaction

http://www.chemistryland.com/CHM107/EarlyChemistry/ClayChemistry/LightningAndFire.jpg

What are the signs that a chemical reaction has occurred?

1. A gas has been produced (Bubbles) Example: Baking soda & vinegar 2. A change in color Example: Iron rusting 3. A change in temperature Example: a flame or cool reaction

http://www.gearheadmom.com/images/uploads/posts/bubbles.jpg

http://content.answers.com/main/content/wp/en-commons/thumb/9/9e/225px-Rust03102006.JPG

http://www.nmsu.edu/~safety/images/fire_meaney.gif

What does Law of conservation of mass mean? Def: Law of conservation of mass: “Says that the

mass of a closed system will remain consistent, regardless of the process acting inside the system.”

http://en.wikipedia.org/wiki/Conservation_of_masshttp://yorkcountyschools.org/teachers/jchristman/chemistry.jpg

How does the Law Of Conservation of mass relates to a chemical reaction?

When a Chemical Reaction happens no new atoms are created or destroyed that is because of the Law Of Conservation Of Mass. It also states the mass of substances produced by a chemical reaction.

What is the role of energy in chemical reactions?

Energy’s role in a chemical reaction is to break intermolecular bonds so elements can escape their compounds and bond with different elements.

Chemical Potential EnergyA potential energy is for a physical change. Example: when you heat up water it turns to

vapor and vapor has more potential energy than water.

What is Exothermic and Endothermic reactions?

Exothermic reaction is where the energy content of the product is less than the reactants; heat is been given out from the system.

Endothermic reaction is where the energy content of the product is less than that of the reactants; heat is taken in by the system.

What is Activation energy and what does it affect during a chemical reaction?

Def: Activation Energy :“The minimum energy reactants must have to

start a chemical reaction.”http://www.google.com/search?hl=en&oi=definer&q=define:activation+energy+is&defl=en

Activation energy in science in it’s energy needed. Activation energy is used to donate its energy. Its energy is needed for a chemical reaction to occur.

http://www.bio-medicine.org/biology-definition/Activation_energy/

1. Combustion Reaction is when oxygen

combines with another compound to form water and carbon dioxide. These reactions are Exothermic they produce heat.

http://www.cdc.gov/eLCOSH/docs/d0400/d000485/image3.jpg

2. Synthesis Reaction Is when two or more simple compound

combine to form a more complicated one.

3. Decomposition reaction Is the opposite of a synthesis reaction- a

complex molecule breaks down to make simpler ones.

4. Single displacement Is when one element trades places with

another element in a compound.5. Double displacement When the anions and cations of two

different molecules switch places to form two entirely different compounds

Examples of each reaction… Combustion Reaction

Synthesis Reaction

http://www.google.com/imgres?imgurl=http://www.usoe.k12.ut.us/CURR/Science/sciber00/8th/matter/images/SYNTHES.GIF&imgrefurl=http://www.usoe.k12.ut.us/CURR/Science/sciber00/8th/matter/sciber/

chemtype.htm&usg=__q8SR4JHXTLWRKZYHgdDZNZCGNAE=&h=144&w=352&sz=3&hl=en&start=2&tbnid=desnldVgUknUVM:&tbnh=49&tbnw=120&prev=/images%3Fq%3Dpictures%2Bof%2Bsynthesis%2Breactions%26hl%3Den

http://www.google.com/imgres?imgurl=http://www.usoe.k12.ut.us/CURR/Science/sciber00/8th/matter/images/SYNTHES.GIF&imgrefurl=http://www.usoe.k12.ut.us/CURR/Science/sciber00/8th/matter/sciber/chemtype.htm&usg=__q8SR4JHXTLWRKZYHgdDZNZCGNAE=&h=144&w=352&sz=3&hl=en&start=2&tbnid=desnldVgUknUVM:&tbnh=49&tbnw=120&prev=/images%3Fq%3Dpictures%2Bof%2Bsynthesis%2Breactions%26hl%3Den

Decomposition reaction

Single displacement

Double displacement

How can you tell the type of reaction by looking at the chemical formula?

“A chemical equation will tell you the formulas and symbols of the reactants and products.”

“ A chemical equation can show the physical state of a substance, whether it is a solid, liquid, gas, or in solution.”

“ A chemical equation can show if special conditions are required for a reaction to take place, such as adding heat or using a catalyst.”

“chemical equation can show if special conditions are required for a reaction to take place, such as adding heat or using a catalyst.”

“And, if the equation is balanced: The coefficient numbers in the equation show the number of molecules, formula units, or atoms of the species involved in the reaction. The coefficients also equal the number of moles of each reactant and product.”

Found on http://www.cliffsnotes.com/WileyCDA/Section/What-information-is-contained-in-a-chemical-equation-.id-305406,articleId-27921.html

http://en.wikipedia.org/wiki/Conservation_of_mass

http://answers.yahoo.com/question/index?qid=20080621044544AAYELRh

http://answers.yahoo.com/question/index;_ylt=AtnDm._xQXnTz7MEyhQ2UiMjzKIX;_ylv=3?qid=20071029073143AACweCC

http://www.bulkmsm.com/research/msm/page37.htm

http://www.mi.mun.ca/users/edurnfor/1100/atomic%20structure/tsld004.htm

http://content.answers.com/main/content/wp/en-commons/thumb/9/9e/225px-Rust03102006.JPG

http://www.gearheadmom.com/images/uploads/posts/bubbles.jpg

http://www.nmsu.edu/~safety/images/fire_meaney.gif http://lc.brooklyn.cuny.edu/smarttutor/core3_22/images/

Atom_structure_new.gif http://www.beaconhurst.stirling.sch.uk/departments/

science/chem7.jpg http://www.usoe.k12.ut.us/CURR/Science/sciber00/8th/

matter/sciber/chemtype.htm Clip art on Microsoft powerpoint

1 – Chemical Reaction Basics 2 – Energy & Chemical Reactions 3 –Types of Chemical Reactions ...

Documents