BY: BUBBALO21

Chemical reactions Rx

The process In which one or more substances is changed into another. http://www.thefreedictionary.com/chemical+reaction

Examples: sodium metal and chlorine gas combined with water equals sodium chloride, or table salt

Another chemical reaction is something as simple as iron rusting. (the change in color.)

Bubbling or a gas will be produced A change in temperature Light will be given off Change in color Energy is produced http://wiki.answers.com/Q/What_are_the_5_signs_of_a_chemical_reaction

Types of reactions Exothermic reactions- Reactions that give

off heat when extra energy from the reaction is released. http://en.wikipedia.org/wiki/Exothermic_reaction

Endothermic reactions- Process in which the reaction absorbs heat and releases cold.

An example of an endothermic reaction would be pouring the contents of an ice pack into a beaker then breaking the bag and pouring in the liquid. The temperature inside the beaker will drop dramatically.

http://homechemistry.blogspot.com/2008/04/endothermic-reactions.html

Types of chemical reactions, cont. Combustion-When carbon combines

with another element to produce water and carbon dioxide.

Decomposition-Opposite of a synthesis reaction, breaks down an element to smaller parts. http://misterguch.brinkster.net/6typesofchemicalrxn.html

Synthesis-Two or more “easy” substances react to form a more complex substance.

Example: H2+O2=H2O

An exothermic reaction would be when you start a gas engine, the gasoline is reacting with the igniter makes a spark inside the engine and it starts up giving off heat.

Another reaction would be adding concentrated acid to water, the acid blends with the water giving off heat as the acid is diluted to a safer level, giving off energy during the process.

http://wildeboer-fitch.wikispaces.com/file/view/video-%20Na%20%2B%20Cl.mp4

Endothermic reactionsEndothermic reactions

An example of an endothermic reaction would be ice, the water reacts with the extremely cold temperatures within the freezer which cause it to freeze to be a solid. http://www.nationmaster.com/encyclopedia/Endothermic-reaction

http://chemed.chem.purdue.edu/demos/movies/large_movies/16.2.mov

Combustions

Wood burning is an example of a combustion because the wood is reacting with O2 gas along with a spark or an ignition.

Combustion reactions are nearly always exothermic, giving off heat. http://www.iun.edu/~cpanhd/C101webnotes/chemical%20reactions/combustion.html

In a combustion reaction O2 is always a reactant!!

Decomposition reactions occur when compounds separate into smaller elements.

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

Video linkhttp://upload.wikimedia.org/wikipedia/en/4/4c/Chemical_decompoition.gif

Formula: A+B=AB

Law of conservation

Mass of substance produced is equal to the mass of chemicals being reacted.

Products-Mass of substances producedReactants-Mass of reacted substances.http://www.mi.mun.ca/users/edurnfor/1100/atomic%20structure/tsld004.htm

During a chemical reaction the atoms are moved around to cause the chemical composition of the molecule to change.

Replacement reactions

Single replacement- A single element replaces another element in a compound.

Double replacement-Two parts of two compounds switch places with each other to form two new compounds. http://www.usoe.k12.ut.us/curr/science/sciber00/8th/matter/sciber/chemtype.htm

Synthesis reaction

Synthesis reaction- Two or more easy substances combine to make a more complex substance. An example would be:H2+O2=H20.

Another example would beMagnesium added to two molecules of oxygen

equals Magnesium Oxide. http://www.usoe.k12.ut.us/curr/science/sciber00/8th/matter/sciber/chemtype.htm

Chemical Formula is A+X=AX An example of both a synthesis reaction and an

exothermic reaction is 2MG+O2 which equals 2MgO

Information bibliography

http://www.thefreedictionary.com/chemical+reaction http://wiki.answers.com/Q/What_are_the_5_signs_of_a_chemical_reaction http://en.wikipedia.org/wiki/Exothermic_reaction http://misterguch.brinkster.net/6typesofchemicalrxn.html http://wildeboer-fitch.wikispaces.com/file/view/video-%20Na%20%2B%20Cl.mp4 http://www.nationmaster.com/encyclopedia/Endothermic-reaction http://www.iun.edu/~cpanhd/C101webnotes/chemical%20reactions/combustion.html http://en.wikipedia.org/wiki/Chemical_decomposition http://www.mi.mun.ca/users/edurnfor/1100/atomic%20structure/tsld004.htm http://www.usoe.k12.ut.us/curr/science/sciber00/8th/matter/sciber/chemtype.htm http://www.usoe.k12.ut.us/curr/science/sciber00/8th/matter/sciber/chemtype.htm

Video and picture bibliography http://chemed.chem.purdue.edu/

demos/movies/large_movies/16.2.mov http://upload.wikimedia.org/

wikipedia/en/4/4c/Chemical_decompoition.gif

http://homechemistry.blogspot.com/2008/04/endothermic-reactions.html